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ONT

$34 Find cheap flights to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 8/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 8/24
Sat 8/31

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These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario
These are the airlines KAYAK users have selected most often from within our search results for flights to Ontario
In the last 7 days travelers have searched 50,552,696 times on KAYAK, and here is why:

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Cheap flight deals to Ontario

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
5:34 pm - 6:58 pmSFO-ONT
1h 24mnonstop
7:48 pm - 9:15 pmONT-SFO
1h 27mnonstop
$38Frontier
Find Deal
Sat, Aug 31 - Tue, Sep 3
6:15 am - 7:40 amSFO-ONT
1h 25mnonstop
7:48 pm - 9:15 pmONT-SFO
1h 27mnonstop
$48Frontier
Find Deal
Sat, Aug 10 - Tue, Aug 13
7:55 pm - 10:39 pmSEA-ONT
2h 44mnonstop
7:45 am - 10:36 amONT-SEA
2h 51mnonstop
$137Delta
Find Deal
Tue, Sep 24 - Sat, Sep 28
6:40 am - 9:15 amSEA-ONT
2h 35mnonstop
4:28 pm - 7:06 pmONT-SEA
2h 38mnonstop
$147Alaska Airlines
Find Deal
Fri, Sep 20 - Sat, Sep 21
7:56 pm - 10:41 pmSEA-ONT
2h 45mnonstop
7:00 am - 10:09 amONT-SEA
3h 09mnonstop
$177Delta
Find Deal
Tue, Dec 24 - Fri, Jan 3
5:15 pm - 7:50 pmSEA-ONT
2h 35mnonstop
6:00 am - 8:45 amONT-SEA
2h 45mnonstop
$180Alaska Airlines
Find Deal
Fri, Sep 6 - Sun, Sep 8
11:19 pm - 12:45 amSFO-ONT
1h 26mnonstop
6:18 am - 7:44 amONT-SFO
1h 26mnonstop
$196United Airlines
Find Deal
Wed, Sep 25 - Sun, Sep 29
11:37 am - 4:49 pmEWR-ONT
8h 12m1 stop
7:30 pm - 5:49 amONT-EWR
7h 19m1 stop
$221American Airlines
Find Deal
Wed, Sep 4 - Thu, Sep 5
4:00 pm - 5:17 pmDEN-ONT
2h 17mnonstop
5:15 am - 8:33 amONT-DEN
2h 18mnonstop
$233United Airlines
Find Deal
Mon, Sep 30 - Wed, Oct 2
3:40 pm - 6:25 pmSLC-ONT
3h 45m1 stop
9:45 am - 3:00 pmONT-SLC
4h 15m1 stop
$238American Airlines
Find Deal
Sat, Oct 12 - Sat, Oct 19

Flights to Ontario - Travel Insights & Trends

Get data-powered insights and trends for flights to Ontario to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to Ontario?

These are the best prices found by users searching on KAYAK in the last 72 hours.
If traveling to Ontario, the cheapest city to fly from in the last 3 days was San Francisco, with flights as low as $34 one-way and $38 round-trip. Flights from Seattle are the most searched and start at $58 for a return trip.

How much is a flight to Ontario?

The average and cheapest price for all flights to Ontario from each origin found by users searching on KAYAK in the last month.
On average, a flight to Ontario costs $140. The cheapest price found on KAYAK in the last 2 weeks cost $19 and departed from Sacramento. The most popular routes on KAYAK are San Francisco to Ontario which costs $99 on average, and Dallas to Ontario, which costs $206 on average.
See prices from:

What is the cheapest day to fly to Ontario?

The average price of all flights to Ontario clicked on KAYAK for each day over the last 12 months.
Based on KAYAK data, the cheapest day to fly to Ontario is Saturday where tickets can be as cheap as $241. On the other hand, the most expensive day to fly is Sunday, where prices are $319 on average.

What is the cheapest month to fly to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights to Ontario is September, where tickets cost $298 on average for one-way flights. On the other hand, the most expensive months are June and November, where the average cost of tickets from the United States is $524 and $491 respectively. For return trips, the best month to travel is January with an average price of $254.

What is the cheapest time of day to fly to Ontario?

The average price for all flights to Ontario depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Ontario is generally in the afternoon, when flights cost $298 on average. The most expensive time of day to fly to Ontario is generally in the evening, which is peak travel time and where the average cost of a ticket is $402.

What is a good deal for flights to Ontario?

If you’re looking for cheap airfare to Ontario, 25% of our users found tickets to Ontario for the following prices or less: From Sacramento $33 one-way - $63 round-trip, from Phoenix Sky Harbor Intl Airport $59 one-way - $63 round-trip, from Denver $59 one-way - $75 round-trip.

How far in advance should I book a flight to Ontario?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price, you should book around 0 weeks before departure. For the absolute cheapest price, our data suggests you should book 98 days before departure.

Which airlines fly to Ontario?

Southwest, Frontier, and American Airlines are commonly used to fly to Ontario from United States. See the amount of flights per week for popular airlines flying to Ontario.

Which airline offers the most flights to Ontario?

Of the 8 airlines that fly to Ontario, Southwest offers the most flights, with around 385 per week, followed by Frontier with 119 flights per week.

How long is the flight to Ontario?

The duration of your flight to Ontario depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to Ontario on KAYAK are from San Francisco, which takes 1h 17m, Miami, which takes 5h 18m, New York, which takes 5h 45m, and Newark, which takes 5h 52m.

How many direct flights to Ontario are there each day?

There are around 124 direct flights from within United States to Ontario every day. Most flights depart in the morning, with 4:00 pm the most common departure time and 45% of flights departing in the morning.

How many direct flights to Ontario are there each week?

Each week there are around 866 direct flights from within United States to Ontario. The most common day for departures is Monday, with 16% of flights taking off on this day.

How many long-haul flights are there to Ontario each week?

Each week, there are 73 medium-haul flights (3-6 hour flight duration) and 607 short-haul flights (up to 3 hour flight duration) to Ontario. There aren't any long-haul flights (6-12 hour flight duration).

How many cities have direct flights to Ontario?

From the United States, there are direct flights to Ontario from 16 cities. The city with the most direct flights is Phoenix Sky Harbor Intl Airport, with 102 direct flights each week.

Good to know

Low season

January

High season

July

Cheapest flight

$34
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 9% increase in price.
Flight from San Francisco to Ontario

When to book flights to Ontario

Are your dates flexible? Find out the best times to travel to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. The information is for flights to Ontario based on your location. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs - booking Ontario flights

  • Can I take a rideshare from the Ontario International Airport (ONT) to my final destination?

    Yes, you can order an app-based rideshare once you land and have claimed your baggage. After baggage claim, follow the signs for “Ride-Share Pickup Location” and these are located near the east end of each passenger terminal.

  • Does the Ontario International Airport (ONT) have services for travelers with limited mobility?

    Yes, ONT offers several services for passengers with reduced mobility. These include wheelchair rental and assistance navigating the airport after landing, as well as services for deaf and visually impaired travelers. Contact your airline in advance if you will need to utilize any of these services.

  • Can I fly directly to the Ontario International Airport (ONT) from any other major US hubs?

    Yes, you will find plenty of direct flights to Ontario from major US cities. For example, United Airlines and Frontier Airlines both operate direct flights from Denver (DEN) to Ontario. You will also find direct flights on board JetBlue from New York City’s JFK airport. Alaska Airlines also offers a direct flight from Seattle to Ontario.

  • What other cities are served by the Ontario International Airport (ONT)?

    The ONT airport mostly serves the city of Ontario, but there are many cities and attractions nearby that it serves, as well. These include Riverside and San Bernardino, as well as the San Bernardino National Forest. It is also quite close to Anaheim, Los Angeles, and Pasadena, California.

  • Are there good restaurants in Ontario International Airport?

    Passengers with flights to Ontario have several options when it comes to where to eat. Look for Schlotzsky’s Deli, El Paseo Cafe and Bar, and Route 66. You will find the restaurants and vending machines in Terminals 2 and 4.

  • Are there good malls or shopping places close to Ontario International Airport?

    Ontario Mills is the largest shopping mall and outlet mall in the Ontario area. Look for a variety of shops at Ontario Mills including Bath & Body Works, North Face, Coach, Polo, and Saks. Or, stop by the movie theater and enjoy a movie in between flights.

  • What kind of services does Ontario International Airport offer?

    At the airport, you can find shopping and dining options, free WiFi for up to 4 hours, cell phone parking lots, an inter-terminal shuttle, and a military lounge. Baggage carts are located for your use throughout the airport.

  • Do hotels in Ontario offer free shuttle service from Ontario International Airport?

    If you are looking for free shuttle service from the airport to a local hotel, you have two choices. Both Azure Hotel and Suites and Red Roof Inn Ontario offer free shuttle service to guests. They are both located approximately 5 minutes from the airport.

  • What is the best way to get from Ontario International Airport to Salt Oasis?

    Salt Oasis is located 6.1 miles from Ontario International Airport. The trip will take approximately 10 minutes by taxi by I-15N. Once you arrive, you can enjoy a salt bath and the salt caves. This is a relaxing way to spend time between flights or a way to de-stress before heading on to your final destination.

  • What is the cheapest flight to Ontario?

    If traveling to Ontario, the cheapest city to fly from in the last 3 days was San Francisco, with flights as low as $34 one-way and $38 round-trip. Flights from Seattle are the most searched and start at $58 for a return trip.

  • How far is Ontario Airport from central Ontario?

    Central Ontario is 3 miles away from Ontario Airport.

  • What is the name of Ontario’s airport?

    There is only 1 airport in Ontario, called Ontario Airport (ONT). It can also be referred to as Ontario or Ontario Intl.

  • How much is a flight to Ontario?

    On average, a flight to Ontario costs $140. The cheapest price found on KAYAK in the last 2 weeks cost $19 and departed from Sacramento Intl Airport.

  • How does KAYAK find such low prices on flights to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Ontario

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Ontario flight deals.
  • If you are picking up a rental car when you land at the Ontario International Airport (ONT), you will need to take the free shuttle bus to the offsite rental car center. You can find the shuttle bus pickup points in front of terminals 2 and 4 at the Terminal Islands.
  • If you are flying into ONT with a pet, you will be happy to find several pet relief areas both inside and outside the terminal buildings. You will find them at terminal 2 gate 210 and terminal 4 gate 410. Otherwise, they are at the far end of each terminal building.
  • If you need to relax after your flight to Ontario, you can take advantage of the Aspire Lounge, which is open to all travelers flying into and departing from the ONT airport. You will find these in terminal 2 at gate 210 and in terminal 4 at gate 410.
  • Landed at the Ontario International Airport (ONT) and not sure where to go next? Visit one of the Travelers Aid desks. The desks are located both in terminal 2 and terminal 4 and are staffed by volunteers committed to helping you get the most out of your trip to Ontario.
  • Have you arrived at the Ontario International Airport (ONT) but your luggage has not? Head to the baggage claim counters in the arrivals area to report the incident to the representatives on duty. They will be able to track your luggage and arrange a delivery to your accommodation address once your luggage arrives in Ontario for your convenience. Just be sure to report it before you leave the airport.
  • Passengers that book flights to Ontario will want to take advantage of the free shuttle provided by the airport. The Ontario Courtesy Shuttle will take passengers between the terminals, parking lot 5, and the Consolidated Rental Car Facility. Shuttle services operate 24 hours a day.
  • Those that are in the military will want to stop by the USO Lounge. Access to the lounge is free to all active military and their families. In the lounge, you can find a TV, snacks, computers, a child care area, and a library. It is open from 6 a.m. to 10 p.m. and can be found in the West Wing for passengers who want somewhere quiet to wait between flights.
  • If you’re picking up or dropping people off at Ontario International Airport, check out the free cell phone lots. You can park there for free while you drop off or wait for your passengers. This area is designed to prevent people from circling the airport endlessly. You can park for free for one hour. No overnight parking allowed.
  • It’s easy to get to and from Ontario International Airport using a variety of transportation options. Look for the car rental services in ConRac which can be reached using the free shuttle service. Or, look for the shuttle, bus, taxi, or train services near the baggage claim area.
  • If you’re looking for business services while you’re at Ontario International Airport, you’ll want to visit the airport hotel located 6 minutes away. The Ontario Airport Holiday Inn offers fully equipped meeting rooms as well as printing, copying, scanning and office supplies.
See more tips

Prefer to fly non-stop to Ontario?

Find which airlines fly direct to Ontario Airport, which days they fly and book direct flights.

Nonstop departures

United States to Ontario

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

See more direct flights

Nonstop returns

Ontario to United States

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

See more direct flights
See more direct flights

Top 5 airlines flying to Ontario

 
See real verified KAYAK customer reviews for airlines flying to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United States to Ontario. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9365 reviews
7.2Entertainment
7.9Comfort
8.2Boarding
7.2Food
8.6Crew
Airline reviews

The plane is small and cramped. Only two snacks. No tv in the seat. Crew was great and the airport staff was great also! We boarded quickly and plane staff was friendly and kind

6.0 GoodAnonymous, Jul 2024EWR - LAX
Read more about Alaska Airlines reviews

The plane is small and cramped. Only two snacks. No tv in the seat. Crew was great and the airport staff was great also! We boarded quickly and plane staff was friendly and kind

Boarding was fast and we didn’t sit on the tarmac very long when leaving. When flight arrived waited too long to get to gate. Aisles too narrow. Seats too small, if fat person was next to me we would have been touching that’s unacceptable.

The staff was friendly. The flight was fine and the food service was fine. We found the Seattle Airport to be very confusing. And not user friendly. Not enough directional signs -- it was hard to figure out where to go. As we entered the line to get to where they checked our ID before we went through the bag check, the staff member wanted us to get out of the line to walk for much longer to get to that area. It was nuts. One of our party spoke up and insisted that we stay where we were. She let us proceed.

The landing was a little rough - but a good flight overall! :)

The check in bag fee should have been disclosed when I booked my flight.

I was upgraded to first class which made the whole experience absolutely wonderful!!

Although the plane was delayed , I appreciate the food credit.

Crew was helpful and respectful. Pilot could have landed a little smoother. Overall delightful experience.

Love flying out of Paine field! Easy check-in, great lunch, small crowd. Don’t let this go away!

I don't understand why passengers are frequently told that they must check their carry-on luggage due to the full flight and we board and find there are multiple empty overhead cabins with space for our carry-on. Crew should be more accurate in their assessment of the space (they have radios and I assumed they were in communication with a crew member on the plan who could tell them that the spaces were full or that there were remaining spaces). We were told in no uncertain terms that any remaining passengers yet to board had to check their carry on because no space remained on the plane, but there were multiple spaces available (including some that were completely empty) when we boarded. As someone who travels with things I must have with me, I do not appreciate this misinformation which causes me delay because I have to wait at baggage claim to get my small carry-on.

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

Rough day of travel all the way around. Wrong info given to us multiple times and mistakes in their booking making our trip 10 hours longer than planned. I’m bummed because I fly Delta all the time and love them. Mistakes happen. Just bummed that this was a rare trip our whole family was traveling together.

Meh. A late flight meant I missed my connections, and a 2pm LAX arrival turned into gettin in after midnight.

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

See my previous comments. I was probably booked in business but was moved to economy

Boarding was efficient. Crew was not pleasant and skipped me during a round of beverage service. Older plane with no seat back screens and I couldn’t connect to wifi or their entertainment offerings.

My flight was delayed for a whole day, so I lost a day of my vacation.

I was refused to used the toilet closes to my seat and had to go to the back of the plane .. it was difficult for me I’m a wheelchair customer

United Airlines was fantastic, however, UnderPricer was a nightmare. I got to the airport 4 hours before my flight. We are moving to New Zealand so had quite a bit of baggage (16 checked items) and so wanted to have plenty of time to get everything taken care of properly. When I went to check in they (United) could only find a ticket for me. The 5 tickets for my children were never officially ticketed. I called Underpricer and they told me it was United's fault and United told me that Underpricer just needs to reissue the tickets, but they refused to. I asked the Underpricer agent to transfer me to his supervisor as I was not getting the help I needed. He told me the supervisor was busy but that he would call me back in 30 minutes. 30 minutes came and went with no phone call. After an hour I called Underpricer back but they would not let me talk to the person I had talked to before, just told me that he was talking with the supervisor and technical support. I called again an hour later, was told the same thing. I tried again later, with only about 30 minutes until my flight was scheduled to leave (meaning I had been at the airport for more than 3 hours with my 5 children trying to get ticketed and board the flight). Also, my husband had moved to New Zealand 3 months prior, I haven't seen him in 3 months, my children hadn't seen their dad in 3 months, we were all extremely eager to get on that flight and get to New Zealand. The situation with the tickets did not get resolved until after it was too late to check our luggage and board our flight. We were devastated. My 11 year old son was in tears at not being able to be on his way to see his dad. Thankfully we were rebooked for the next evening, but that night it felt devastating. We'd been at the airport for 4 hours waiting. My in-laws waited with me and then helped me reload all our baggage and took us home to stay with them for the night. On the newly booked flights we could not sit together - my children were spread throughout the plane. So, even though I had paid extra to select our seats after buying my seats from Underpricer only two of us were able to sit together (thankful that my 11 year old wasn't all by himself, but not happy that my 14 & 16 year old daughters were seated by strangers). I really feel that Underpricer should refund me what I paid for the seating ($120 USD). It was a very frustrating situation and I plan on never using Kayak or Underpricer ever again.

The lady at the check in counter wasn't helpful

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

My husband and I pre-ordered our food, but they did not have my husband’s order, and my cheese plate was very average. I asked for a blanket and was told they don’t carry blankets on domestic routs. The flight was on time and smooth!

There were delays on both ends. It made it less than excellent. This plane was great though

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Attendants were rude. Scowling. Seats were miserable and we paid extra.

Fight crew was not very attentive and the bastions were gross!

Our flight was great we left Kona earlier and got into LAX almost an 1hour earlier as well. LAX AA is in repair so to get out and found our bus to get pick up was a bit confusing.

Plane was good but was delayed. probably not AA fault but caused a 1 hour delay. Seating was cramped.

5 hour flight - full flight - not enough room to use my computer - slightly delayed - Admirals club was excellent quality food, drink made up for flight seating. No food offerred on flight, you ahd to prebook.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

I can say I will not be taking this airline again any time soon. Seat were uncomfortable and too tight. Lack of chair screen and little overhead space.

Better than expected.on time. Friendly staff in NY however MYR not so nice.

The flight crew and flight attendants are poorly trained and demonstrate poor professionalism. They have a sloppy appearance and communicate with patrons poorly. It is embarrassing for them to be representatives of an airline and for them to be called professionals.

After 5 hours of delay, they cancelled the flight. Very disappointed

My flight to LA was cancelled. I waited at the airport for 3 hrs saying it was delayed and then all of a sudden it was cancelled. Frontier only gave me a voucher and refund but could not rebook me. Flights on other airlines were too expensive last minute. I had to drive down to LA and didn’t even take my return flight home since I had to drive. One of the worst airline experiences in my life. It’s crazy how airlines can just upend people’s plans just like that.

Flying Frontiier was extremely poor!! I paid for a7:15am flight on flight 1601 from PHL To Las Vegas and the delay was brutally, excruciatingly and disgustingly long (8 hrs). I arrived by Uber to PHL at 5:30 am and had to spend the entire 8 hr delay inside the airport. Even more atrocious was that the flight was delayed twice. On the phone with customer service for two hours and was not fully compensated. I feel taken advantage of with this airline. They offered a menial couched for another flight within 90 days to me and my husband who has never flown but this experience has made us almost 100% sure to not fly this airline and will suggest that others don’t either. We don’t want to book ever again, don’t want a menial voucher and I believe by standard and because the flight was delayed for 8 hours, I should be fully reimbursed for the entire round trip. There is no excuse why this should have ever occurred. After sharing my experience with others in Vegas and Philadelphia, I was told that Frontier airlines is notorious for long delayed flights, poor customer service and refusal to compensate people correctly. I’m very nervous to see what departing from Vegas to Philadelphia will bring.

I fly Frontier often and generally don't have any issues. For some reason, the Denver to Houston's George Bush Intercontinental (IAH) flight always needs to wait on the tarmac in Houston because a gate is not available after landing. I've been stuck for as little as 15 minutes and as much as a little over an hour. I know only fly the Frontier Denver to IAH route when there is not an available flight to Houston Hobby (HOU).

Flight was 3 hours late leaving. Poor communication from the staff about delays. Impossible to get in touch with customer service (by design). And it actually didn't come out to be much cheaper than a non-budget airline! Not worth the headache, I'm never flying Frontier again

I’ve never flown frontier without a flight getting canceled. I understand that things go wrong with planes, but all other airlines handle cancellations so well. Frontier becomes a dumpster fire if a problem appears for them.

Checking in was easy and simple, crew was nice and efficient, but I would improve seat assignment randomness to make it easier to sit together based on when you check in. Overall would fly with them again.

Flying Frontier was a nightmare. From the booking through Kayak, checking in, departing and arriving, I will never recommend Kayak or Frontier.

Book Cheap Ontario Plane Tickets

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Ontario found on KAYAK in the last 72 hours.
8/31Sat
nonstopFrontier
1h 24mSFO-ONT
9/3Tue
nonstopFrontier
1h 27mONT-SFO
$38
8/10Sat
nonstopFrontier
1h 25mSFO-ONT
8/13Tue
nonstopFrontier
1h 27mONT-SFO
$48
9/24Tue
nonstopDelta
2h 44mSEA-ONT
9/28Sat
nonstopDelta
2h 51mONT-SEA
$137
9/20Fri
nonstopAlaska Airlines
2h 35mSEA-ONT
9/21Sat
nonstopAlaska Airlines
2h 38mONT-SEA
$147
12/24Tue
nonstopDelta
2h 45mSEA-ONT
1/3Fri
nonstopDelta
3h 09mONT-SEA
$177
9/6Fri
nonstopAlaska Airlines
2h 35mSEA-ONT
9/8Sun
nonstopAlaska Airlines
2h 45mONT-SEA
$180
9/25Wed
nonstopUnited Airlines
1h 26mSFO-ONT
9/29Sun
nonstopUnited Airlines
1h 26mONT-SFO
$196
9/4Wed
1 stopAmerican Airlines
8h 12mEWR-ONT
9/5Thu
1 stopAmerican Airlines
7h 19mONT-EWR
$221
9/30Mon
nonstopUnited Airlines
2h 17mDEN-ONT
10/2Wed
nonstopUnited Airlines
2h 18mONT-DEN
$233
10/12Sat
1 stopAmerican Airlines
3h 45mSLC-ONT
10/19Sat
1 stopAmerican Airlines
4h 15mONT-SLC
$238

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Ontario found on KAYAK in the last 72 hours.
8/4Sun
nonstopFrontier
1h 22mSFO-ONT
$34
7/30Tue
nonstopFrontier
1h 47mSLC-ONT
$34
9/25Wed
nonstopAlaska Airlines
2h 35mSEA-ONT
$60
11/1Fri
nonstopDelta
2h 34mSEA-ONT
$89
10/22Tue
1 stopDelta
6h 11mDEN-ONT
$98
10/22Tue
1 stopAlaska Airlines
6h 12mSEA-ONT
$98
10/9Wed
1 stopAmerican Airlines
6h 14mSFO-ONT
$99
9/24Tue
1 stopAmerican Airlines
3h 51mSLC-ONT
$109
8/16Fri
nonstopUnited Airlines
1h 27mSFO-ONT
$115
8/23Fri
nonstopUnited Airlines
1h 26mSFO-ONT
$117

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Last minute flights to Ontario

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Ontario that are departing in the next 10 days.
7/30Tue
nonstopFrontier
1h 22mSFO-ONT
7/31Wed
nonstopFrontier
1h 24mONT-SFO
$93
7/30Tue
nonstopFrontier
1h 22mSFO-ONT
8/6Tue
multi-stopFrontier
17h 53mONT-SFO
$104
7/27Sat
nonstopUnited Airlines
1h 31mSFO-ONT
8/3Sat
nonstopUnited Airlines
1h 23mONT-SFO
$274
7/26Fri
multi-stopAmerican Airlines
9h 10mLGA-ONT
7/30Tue
multi-stopAmerican Airlines
9h 01mONT-LGA
$293
7/26Fri
multi-stopAmerican Airlines
9h 05mLGA-ONT
8/4Sun
multi-stopAmerican Airlines
10h 17mONT-LGA
$363
7/26Fri
multi-stopDelta
11h 59mLGA-ONT
8/4Sun
multi-stopDelta
9h 50mONT-LGA
$368
7/27Sat
multi-stopDelta
8h 00mEWR-ONT
8/14Wed
multi-stopDelta
8h 18mONT-EWR
$391
7/27Sat
multi-stopAlaska Airlines
6h 11mSEA-ONT
7/29Mon
nonstopAlaska Airlines
2h 35mONT-SEA
$466
7/29Mon
multi-stopUnited Airlines
10h 58mEWR-ONT
8/14Wed
multi-stopUnited Airlines
9h 24mONT-EWR
$482
7/30Tue
nonstopAlaska Airlines
2h 35mSEA-ONT
7/30Tue
multi-stopAlaska Airlines
6h 23mONT-SEA
$511

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - United States

Cabin classes:

$372
$438
$193
$34

Browse origins:

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