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Find cheap flights to Ontario from $38

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight departing on 3/19. 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
Fri 3/22
Fri 3/29

Search hundreds of travel sites at once for deals on flights to Ontario

 
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 50,407,861 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.
3:08 pm - 4:36 pmSFO-ONT
1h 28mnonstop
12:59 pm - 2:29 pmONT-SFO
1h 30mnonstop
$38Frontier
Find Deal
Tue, Mar 19 - Wed, Mar 27
4:26 pm - 6:41 pmPDX-ONT
2h 15mnonstop
12:20 pm - 2:40 pmONT-PDX
2h 20mnonstop
$38Frontier
Find Deal
Wed, Apr 10 - Tue, Apr 16
10:30 am - 1:12 pmSEA-ONT
2h 42mnonstop
7:00 am - 9:55 amONT-SEA
2h 55mnonstop
$137Delta
Find Deal
Tue, Apr 9 - Sat, Apr 20
7:50 pm - 10:17 pmSEA-ONT
2h 27mnonstop
6:00 am - 8:47 amONT-SEA
2h 47mnonstop
$147Delta
Find Deal
Sat, Mar 16 - Tue, Mar 26
2:35 pm - 5:10 pmSEA-ONT
2h 35mnonstop
7:59 pm - 10:48 pmONT-SEA
2h 49mnonstop
$161Alaska Airlines
Find Deal
Thu, Mar 21 - Thu, Mar 21
6:47 am - 9:25 amSEA-ONT
2h 38mnonstop
6:00 am - 8:50 amONT-SEA
2h 50mnonstop
$167Alaska Airlines
Find Deal
Wed, Apr 3 - Wed, Apr 10
8:00 am - 11:54 amDEN-ONT
4h 54m1 stop
12:55 pm - 6:03 pmONT-DEN
4h 08m1 stop
$187American Airlines
Find Deal
Tue, Mar 26 - Tue, Apr 2
8:45 pm - 10:20 pmSFO-ONT
1h 35mnonstop
6:00 am - 7:36 amONT-SFO
1h 36mnonstop
$199United Airlines
Find Deal
Sat, Mar 2 - Fri, Mar 8
7:30 pm - 8:57 pmDEN-ONT
2h 27mnonstop
5:15 am - 8:32 amONT-DEN
2h 17mnonstop
$206United Airlines
Find Deal
Wed, Mar 13 - Sat, Mar 16
2:59 pm - 8:56 pmJFK-ONT
8h 57m1 stop
10:31 pm - 9:30 amONT-JFK
7h 59m1 stop
$253American Airlines
Find Deal
Wed, Mar 6 - Wed, Mar 13

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 $38 one-way and $38 round-trip. Flights from Seattle are the most searched and start at $80 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 $182. The cheapest price found on KAYAK in the last 2 weeks cost $19 and departed from Phoenix Sky Harbor Intl Airport. The most popular routes on KAYAK are Dallas to Ontario which costs $227 on average, and San Francisco to Ontario, which costs $170 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 Friday where tickets can be as cheap as $262. On the other hand, the most expensive day to fly is Sunday, where prices are $331 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 January, where tickets cost $288 on average for one-way flights. On the other hand, the most expensive months are June and April, where the average cost of tickets from the United States is $633 and $630 respectively. For return trips, the best month to travel is September with an average price of $278.

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 $372.

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 Phoenix Sky Harbor Intl Airport $37 one-way - $44 round-trip, from Reno $39 one-way - $53 round-trip, from Denver $66 one-way - $119 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 28 days before departure.

Which airlines fly to Ontario?

Southwest, Frontier, and Delta 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 9 airlines that fly to Ontario, Southwest offers the most flights, with around 400 per week, followed by Frontier with 82 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 23m, Miami, which takes 5h 23m, New York, which takes 5h 52m, and Boston, which takes 6h 09m.

How many direct flights to Ontario are there each day?

There are around 111 direct flights from within United States to Ontario every day. Most flights depart in the morning, with 5:00 pm the most common departure time and 47% of flights departing in the morning.

How many direct flights to Ontario are there each week?

Each week there are around 772 direct flights from within United States to Ontario. The most common day for departures is Thursday, with 15% of flights taking off on this day.

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

Each week there are around 7 long-haul flights (6-12 hour flight duration), 59 medium-haul (3-6 hour flight duration) and 729 short-haul (up to 3 hour flight duration) flights to Ontario. The most long-haul flights depart from Taipei City Taiwan Taoyuan Intl Airport.

How many cities have direct flights to Ontario?

From the United States, there are direct flights to Ontario from 20 cities. The city with the most direct flights is Phoenix Sky Harbor Intl Airport, with 104 direct flights each week.

Good to know

Low season

January

High season

December

Cheapest flight

$38
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 24% 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 $38 one-way and $38 round-trip. Flights from Seattle are the most searched and start at $80 for a return trip.

  • How far is Ontario from central Ontario?

    Central Ontario is 3 miles away from Ontario.

  • What is the name of Ontario’s airport?

    There is only 1 airport in Ontario, called Ontario (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 $182. The cheapest price found on KAYAK in the last 2 weeks cost $19 and departed from Phoenix Sky Harbor 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

  • Looking for cheap airfare to Ontario? 25% of our users found tickets to Ontario for the following prices or less: From Phoenix Sky Harbor Intl $37 one-way - $40 round-trip, from Portland $138 one-way - $180 round-trip, from Honolulu $150 one-way - $232 round-trip
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be June and July. The cheapest month to fly from United States is January.
  • 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, 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, +23 more

Aeromexico, Air Canada, +24 more

Wednesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 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, +21 more

Aeromexico, Air Canada, +22 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, +23 more

Aeromexico, Air Canada, +24 more

Wednesday

Aeromexico, Air Canada, Air France, +21 more

Aeromexico, Air Canada, +22 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, +21 more

Aeromexico, Air Canada, +22 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

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 KAYAK reviews.
8.1
Alaska AirlinesOverall score based on 9283 reviews
86crew
79comfort
74entertainment
81overall
82boarding
74food
Airline reviews

I wish it hadn't been delayed. I'm thankful my husband got home safely but I understand turbulence was NOT GOOD.

Read more about Alaska Airlines

I wish it hadn't been delayed. I'm thankful my husband got home safely but I understand turbulence was NOT GOOD.

I had to check-in my small carry-on at the gate which was inconvenient. According to the people at the gate at SEATAC, there wasn't anymore room in the overhead bins. I obliged. But, when I got inside the aircraft, there was plenty of room EVERYWHERE! It was either miscommunication or incompetence among the Alaska personnel.

That they have Water and non-alcoholic beverages! Love being hydrated on flights

Bad. The fight was late and they gave a ridiculous $12 stipend. Better give something or nothing. $12 is ridiculous.

Alaska seems to be pretty no frills: no real snack even for a 7 hr flight, no TV screens, and cramped seating. But the price was right and staff was good.

It was a good flight . It wasn’t a full flight so we had space to move around

I had to change my plans and my tickets were non-refundable. I booked separately with Alaska Airlines and that was mostly fine. I'm unhappy with Kayak of course.

So fantastic! Everyone was pleasant. The snacks were good. I will definitely be taking Alaska airlines again.

Thank you for all the accommodations great flight great service first time flying & it was a Great experience flying with Alaska Airlines

Great as always. Alaska is my top airline when flying to/from the Pacific NW. I was a bit anxious when I found out I was in a 737 Max, but it went well for us.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Crew was not friendly when I went to request a seat change.

Really impressive staff at airport and on plane, especially given how busy it was

Was a great smooth flight from Detroit to San Diego.

The boarding process was terrible especially with an indirect flight Chicago to Seattle to San Diego was terrible talking about we overbooked a flight idk if I’d take this airline ever again we got off our flight from Chicago to Seattle and we traveled for business and they told us our connecting flight was over booked and their was no seats asking people to take a delayed next flight and they don’t tell anyone coughing to wear masks seats 30A-B were terrible during the flight no one wants to sit next to people coughing all around I don’t want to be sick traveling for work or get sick anytime it’s very upsetting the staff doesn’t take this stuff serious to tell them to wear masks when they see people coughing and sneezing

Crew was great. However the seat I had would not recline and stay put. It would spring back to upright. Hopefully they can check the seats and maintain them. Otherwise the plane is clean and the crew is very friendly.

Boarding in Seattle is always a mess. Sat in Deltas new domestic first class cabin. Everything was great except I found the seat cushion to be fairly uncomfortable. I’m a bigger guy so take that into mind (6’2” / 300 lbs.). Crew was meh.

Like most domestic flights in the US, you are basically on your own with this airline when it comes to food, so be sure to purchase meals and drinks ahead of time or expect to arrive starving and dehydrated (like I was).

The flight and crew were fine. The entertainment- the sound was so bad through the headphones I could barely understand it and it was a show I had seen before. The food might have been fine but having to have an account with united in order to access the app in order to pay for the food was rage inducing. I had entered my credit card info at home and logged in as guest but that wouldn’t allow the “wallet” tab to open in the app. And then the wifi was so bad that it took about 45 minutes to fully log in and get all the info working at which time I missed the food. You shouldn’t have to give your address, email and phone number in order to get a hamburger.

The control panel for the seat back screen did not work at all after takeoff.

United airline kept delaying our flight back to Phoenix for 8 hours before they cancelled it! If they know that we are not flying out for whatever the reason is, why did they keep lying to us for hours. We could find another flight earlier or even find a hotel with a shuttle. But cancellation at about midnight was not fun. We stayed in the airport all night till the following morning when we bought an Alaska tickets to go back to Phoenix. Total of 14 hours in the airport.

Poor seating comfort, seat cushion too thin, very uncomfortable. My luggage didi not make the flight due to equipment change. At least. United had it delivered the next day. I was without my toilet items for one day.

The crew was nice but the people going to Orange County are so entitled. Everyone thinks everything is suppose for be perfect for them. Tough crowd.

Unfortunately our flight was delayed by 45 minutes due to Kate arriving aircraft. Once we stated everything was great.

My experience is based on one crew member. I had found my seat and sat down but there was a gentleman to claimed to the flight attendant I was in his seat. She then came to me and curtly said, "I need your ticket!" No hi, no excuse me may I see your boarding pass? NOTHING! I was taken aback by her attitude and she repeated herself, "your ticket?!?!" I calmly responded with ok, here you go. Only to discover the gentleman was looking at the wrong boarding pass. She gave me back my ticket with no apology. She then was curt with another man who was putting his coat in the overhead bin, already helped by another flight attendant who said it was fine. She realizes it's ok and then asks him if he drinks. The look on the man's face was priceless. She said she was going to comp him drinks. He gets offered a comp drink for a coat as well as an apology, and I got no apology.

Flight cancelled because of the grounded 737s. United was good about it and got us onto a later Alaska Airlines flight to Oakland (not San Francisco as originally intended). Had to go through security again and my wife dropped her MacBook Pro, which broke, a $2,500 whoopsie. But we made it home.

Crew was unhelpful in boarding. Did not help passengers board and store bags efficiently. Did not alleviate tensions as passengers had to stow bags then return forward to seats. Baggage rules are unreasonable. Will fly southwest next time

Delays, excuses, delays, and more delays. This company is BROKEN.

Plane felt so crowded and tightly packed. The chair itself was not comfortable.

They attended to my needs as I couldn't walk and they provided a wheelchair for me.q

Poor availability of food. Cold cabin temperature. Extremely long waiting time for a flight attendant to respond to a call button signal.

2.5h delay due to unruly passenger in first class. Had to be removed from the flight. No food unless pre ordered. Didn't know we would need it because of delay.

This time my flight was smooth and uneventful. They started boarding even earlier than it was scheduled. I was pleasantly surprised. Thank you!

Only my carry that was taken and found it in my final destination

The flight landed at LAX we were then bussed to collect our bags. That process took nearly as long as the flight. Luckily we weren't in a hurry!

We had a humorous and kind flight attendant, boarding was efficient, flight smooth, pilot gave updates and was humorous too, two drink services was very helpful. In flight entertainment is always appreciated

Flflight crew were amazing, kind, and considerate. Fofood choices were limited, and didn’t have a variation.

I was disappointed throughout the my whole experience. After being delayed for 3 hrs sitting in plane, not accommodated by staff

The flight was delayed and I had to cancel because I would have missed my connection and there were no other flights for the next two days. They also lost my bag!!

They didn’t bother to restock the plane before we left, so most items on the menu were not available.

they charge too much when you arrive in the air port

The flight was canceled, then delayed twice, we were moved gates twice. Short staff at the counter and check in. We waited for our flight 9 hours. Will never use Frontier ever again, or Spirit.

It’s a cheap airline and I wish if they had better seats.

absolutely horrific. delayed flights, overbooking. over charging. nightmare service beyond words. stay away.

My husband didn't get boarded on this flight. He was asked to pay $50 extra by the Frontier staff to get two boarding passes for check-in at the Las Vegas airport. He refused to pay this extra $50 charge and tried to do check-in online by himself but it seemed to be late with only 7 mins left. It ended up that my daughter and my husband missed the 7-minute time window. They had to take the next non-direct flight which took more than 12 hours from Las Vegas to San Francisco, a very poor experience for them.

Frontier is a no-frills airlines were the focus is low cost. You get basic service so don't set your expectations high. Watch out thought because this airline, like a few others, will try to nickel and dime you.

Was charged 99 dollars for a bag despite agents previously telling me it would be ok. Customer service was unhelpful

I will like you ( Frontier Airlines) to fly into LAX instead of ONT because I live in LA and the subway takes me to my house in just 15 minutes

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.
3/19Tue
nonstopFrontier
1h 28mSFO-ONT
3/27Wed
nonstopFrontier
1h 30mONT-SFO
$38
4/10Wed
nonstopFrontier
2h 15mPDX-ONT
4/16Tue
nonstopFrontier
2h 20mONT-PDX
$38
4/9Tue
nonstopDelta
2h 42mSEA-ONT
4/20Sat
nonstopDelta
2h 55mONT-SEA
$137
3/16Sat
nonstopDelta
2h 27mSEA-ONT
3/26Tue
nonstopDelta
2h 47mONT-SEA
$147
3/21Thu
nonstopAlaska Airlines
2h 35mSEA-ONT
3/21Thu
nonstopAlaska Airlines
2h 49mONT-SEA
$161
4/3Wed
nonstopAlaska Airlines
2h 38mSEA-ONT
4/10Wed
nonstopAlaska Airlines
2h 50mONT-SEA
$167
3/26Tue
1 stopAmerican Airlines
4h 54mDEN-ONT
4/2Tue
1 stopAmerican Airlines
4h 08mONT-DEN
$187
3/2Sat
nonstopUnited Airlines
1h 35mSFO-ONT
3/8Fri
nonstopUnited Airlines
1h 36mONT-SFO
$199
3/13Wed
nonstopUnited Airlines
2h 27mDEN-ONT
3/16Sat
nonstopUnited Airlines
2h 17mONT-DEN
$206
3/6Wed
1 stopAmerican Airlines
8h 57mJFK-ONT
3/13Wed
1 stopAmerican Airlines
7h 59mONT-JFK
$253

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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.
4/20Sat
nonstopFrontier
3h 22mDFW-ONT
$38
4/13Sat
nonstopFrontier
2h 15mPDX-ONT
$38
3/17Sun
1 stopAmerican Airlines
4h 19mDEN-ONT
$88
4/24Wed
nonstopAlaska Airlines
2h 33mSEA-ONT
$89
3/18Mon
1 stopDelta
8h 54mDEN-ONT
$98
3/21Thu
nonstopAlaska Airlines
2h 33mSEA-ONT
$98
3/27Wed
nonstopUnited Airlines
2h 27mDEN-ONT
$109
3/27Wed
1 stopDelta
5h 17mPDX-ONT
$111
3/12Tue
1 stopUnited Airlines
4h 59mDEN-ONT
$118
6/4Tue
1 stopAmerican Airlines
5h 49mSFO-ONT
$125

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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.
2/26Mon
multi-stopFrontier
10h 53mDFW-ONT
2/27Tue
nonstopFrontier
2h 54mONT-DFW
$102
2/26Mon
multi-stopFrontier
16h 27mDFW-ONT
2/27Tue
nonstopFrontier
2h 54mONT-DFW
$120
2/24Sat
multi-stopAmerican Airlines
5h 43mSFO-ONT
3/9Sat
multi-stopAmerican Airlines
5h 30mONT-SFO
$247
2/22Thu
multi-stopAmerican Airlines
8h 57mJFK-ONT
3/4Mon
multi-stopAmerican Airlines
7h 58mONT-JFK
$253
2/24Sat
multi-stopDelta
8h 26mLGA-ONT
2/28Wed
multi-stopDelta
7h 05mONT-LGA
$276
2/22Thu
multi-stopDelta
9h 11mLGA-ONT
2/27Tue
multi-stopDelta
12h 29mONT-LGA
$281
2/24Sat
nonstopUnited Airlines
1h 34mSFO-ONT
3/9Sat
nonstopUnited Airlines
1h 35mONT-SFO
$304
2/22Thu
nonstopUnited Airlines
1h 35mSFO-ONT
2/28Wed
nonstopUnited Airlines
1h 41mONT-SFO
$324
2/26Mon
nonstopAlaska Airlines
2h 30mSEA-ONT
3/4Mon
nonstopAlaska Airlines
2h 50mONT-SEA
$337
2/26Mon
multi-stopAlaska Airlines
4h 18mSEA-ONT
3/4Mon
nonstopAlaska Airlines
2h 50mONT-SEA
$346

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - United States

Cabin classes:

$486
$397
$135
$19

Browse origins:

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