ONT - ORD

$62 Find Cheap Flights from Ontario to Chicago O'Hare Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to O'Hare Intl departing on 2/6. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago O'Hare Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Chicago, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Chicago, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$169
Overall average: $518
Multiple Airlines
Mon 12/15Sun 1/4
ONT - ORD • 2 stops
Cheapest non-stop
$447
United Airlines
Mon 12/22Thu 1/1
ONT - ORD • Non-stop
Our travelers' advice
AI-generated summary based on content written by travel experts
ONT offers streamlined security with short wait times.
Take the CTA Blue Line from ORD to downtown Chicago.
Expert advice
Expert advice
Expert advice
Expert advice
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 26% price drop
July
Most popular
Good to know
Good to know
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+1
Good to know
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+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to O'Hare Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Ontario to O'Hare Intl (ONT-ORD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to O'Hare Intl 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to O'Hare Intl

Mon, Dec 15 - Sun, Jan 4
Multiple Airlines Logo
5:18 pm - 1:58 pmONT-ORD
18h 40m2 stops
Multiple Airlines Logo
10:49 pm - 5:15 pmORD-ONT
20h 26m1 stop
$169Multiple Airlines
Find Deal
Thu, Dec 4 - Sun, Dec 7
Frontier Logo
12:04 pm - 12:12 amONT-ORD
10h 08m1 stop
Frontier Logo
6:11 am - 2:25 pmORD-ONT
34h 14m2 stops
$170Frontier
Find Deal
Wed, Dec 31 - Sun, Jan 4
Frontier Logo
6:45 am - 12:12 amONT-ORD
15h 27m1 stop
Frontier Logo
10:49 pm - 5:15 pmORD-ONT
20h 26m1 stop
$174Frontier
Find Deal
Thu, Dec 4 - Thu, Dec 11
Frontier Logo
2:59 pm - 11:42 amONT-ORD
18h 43m1 stop
Frontier Logo
9:21 am - 6:35 pmORD-ONT
11h 14m1 stop
$176Frontier
Find Deal
Tue, Dec 9 - Tue, Dec 16
Multiple Airlines Logo
12:30 pm - 1:58 pmONT-ORD
23h 28m1 stop
Multiple Airlines Logo
7:20 am - 9:17 pmORD-ONT
39h 57m2 stops
$177Multiple Airlines
Find Deal
Wed, Dec 24 - Thu, Jan 1
Frontier Logo
6:00 pm - 2:17 pmONT-ORD
18h 17m1 stop
Frontier Logo
3:27 pm - 9:17 pmORD-ONT
7h 50m1 stop
$179Frontier
Find Deal
Fri, Dec 5 - Thu, Dec 11
Frontier Logo
2:05 pm - 11:42 pmONT-ORD
7h 37m1 stop
Frontier Logo
9:21 am - 6:35 pmORD-ONT
11h 14m1 stop
$180Frontier
Find Deal
Fri, Dec 5 - Thu, Dec 11
Frontier Logo
3:20 pm - 12:12 amONT-ORD
6h 52m1 stop
Frontier Logo
7:00 am - 11:09 amORD-ONT
6h 09m1 stop
$181Frontier
Find Deal
Wed, Dec 24 - Wed, Dec 31
Multiple Airlines Logo
6:00 pm - 2:17 pmONT-ORD
18h 17m1 stop
Multiple Airlines Logo
7:57 pm - 8:53 amORD-ONT
14h 56m1 stop
$182Multiple Airlines
Find Deal
Mon, Dec 8 - Thu, Dec 11
Frontier Logo
3:20 pm - 12:12 amONT-ORD
6h 52m1 stop
Frontier Logo
9:21 am - 6:35 pmORD-ONT
11h 14m1 stop
$184Frontier
Find Deal
Booking Insights

KAYAK's insights & trends for Ontario to O'Hare Intl flights

Get data-powered insights and trends into flights from Ontario to O'Hare Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to Chicago O'Hare Airport?

The average price of all round-trip flights from Ontario to Chicago O'Hare Intl Airport clicked on KAYAK for each day over the last 12 months.

When flying from Ontario to Chicago O'Hare Airport, you should consider leaving on a Thursday and avoid Sundays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Tuesdays and the most expensive ones on Mondays.

What is the cheapest month to fly from Ontario to Chicago O'Hare Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Chicago O'Hare Intl Airport, 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 from Ontario to Chicago O'Hare Intl Airport is February, where tickets cost $288 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is $518 and $518 respectively.

Can I save money by flying with a layover from Ontario to Chicago O'Hare Intl Airport?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $377, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Ontario to Chicago O'Hare Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Chicago O'Hare Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Chicago O'Hare Intl Airport, you should book around 4 weeks before departure, which saves you about 37% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to O'Hare Intl

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
ONT

ONT offers streamlined security with average wait times of 6-15 minutes, making it a convenient choice for travelers.

ORD

Take the CTA Blue Line train from ORD to downtown Chicago in about 45 minutes, avoiding traffic delays.

Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on ORD

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson

Jennifer Simonson

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

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Good to know

Low seasonJanuary
Cheapest flight$62
Best time to beat the crowds but there is an average 32% increase in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Ontario to Chicago O'Hare Airport

When to book flights from Ontario to O'Hare Intl

Are your dates flexible? Find out the best times to travel from Ontario to O'Hare Intl 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. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Ontario to Chicago O'Hare Airport flights

  • How can I get Downtown from Chicago O'Hare International Airport (ORD)?

    The means of transport you choose will determine how fast you will get downtown and how much you will likely spend. If you are on a budget, take CTA public bus or the suburban public bus as a public means of transport. Consider a taxi as a mode of transfer if you are getting late for your appointment. Shared Ride Shuttle, Trains, Airport shuttles, and Car rentals are also available.

  • How early should I get to ONT Airport?

    ONT is the busiest airport in the region, thus experiencing long security lines and insane traffic. To navigate through the lines, ensure you get to the airport 2-3h before your scheduled departure time.

  • Are there onsite hotels in ORD?

    If you are looking forward to sleeping at the airport, there is one onsite hotel with a free airport shuttle connected to all Terminals via an underground walkway. The Hilton Chicago O' Hare Airport Hotel is located in Terminal 2. However, suppose you miss a room at this hotel. In that case, nearby hotels offer free bus shuttles, like Aloft Chicago O'Hare and The Crowne Plaza Chicago O'Hare Hotel and Conference Center.

  • Can I book a flight with layover options?

    If you love airline layover options, consider flying with Spirit Airlines and Frontier Airlines. Both tend to have their layover option at Las Vegas Harry Reid International Airport (LAS).

  • What is the cheapest flight from Ontario to Chicago O'Hare Intl Airport?

    In the last 3 days, the lowest price for a flight from Ontario to Chicago O'Hare Intl Airport was $62 for a one-way ticket and $169 for a round-trip.

  • Do I need a passport to fly between Ontario and Chicago O'Hare Airport?

    No, a passport isn't needed to fly from Ontario to Chicago O'Hare Airport. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Ontario to Chicago O'Hare Airport?

    When flying out of Ontario you will be using Ontario. You will be landing at Chicago O'Hare Airport, also known as Chicago O'Hare Intl.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Chicago O'Hare Airport?

    All the following airlines offer inflight Wi-Fi service on the Ontario to Chicago O'Hare Airport flight route: JetBlue, American Airlines, Alaska Airlines, SWISS, Lufthansa, Hawaiian Airlines, and Delta.

  • Which aircraft models fly most regularly from Ontario to Chicago O'Hare Airport?

    The Boeing 737-800 is the aircraft model that flies most regularly on the Ontario to Chicago O'Hare Airport flight route.

  • Which airline alliances offer flights from Ontario to Chicago O'Hare Airport?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Ontario and Chicago O'Hare Airport, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Ontario to Chicago O'Hare Airport?

    There are nonstop flights from Ontario to Chicago O'Hare Airport on a daily basis.

  • Which is the best airline for flights from Ontario to Chicago, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Ontario to Chicago are Southwest and Delta. With an average price for the route of $440 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $357 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Ontario to Chicago O'Hare Airport?

    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 from Ontario to Chicago O'Hare Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport from 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 from Ontario to Chicago O'Hare Airport?

    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 Chicago O'Hare Airport with an airline and back to Ontario with another airline. Booking your flights between Ontario and ORD can sometimes prove cheaper using this method.

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

    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 Chicago O'Hare Airport from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ontario to Chicago O'Hare Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $218 or less one-way and $405 or less round-trip.
  • If you have an early flight from Ontario International Airport (ONT) and sleeping in the airport sounds like a nightmare, there are nearby hotels where you can spend your night. The Candlewood Suites Ontario Convention Center, Comfort Suites Ontario Convention Center, and Azure Hotel & Suites Ontario Airport are nearby hotels. It is worth mentioning that Comfort Suites Ontario Convention Center; is the only hotel that offers free shuttle services to the airport terminals.
  • Regardless of what class service you are flying, there are onsite lounges that you can access by either purchasing a day pass or paying at the door at Ontario International Airport (ONT). Aspire Lounge is located in Terminal 2 and Terminal 4.
  • Ontario International Airport has nursing facilities for mothers traveling with their toddlers. There are two baby rooms for breastfeeding and diaper changing. One changing room is located in Terminal 2 and another in Terminal 4. These rooms have a sink, comfortable seats, a changing table, power output, and a private breastfeeding unit. In Chicago O'Hare International Airport (ORD), the mother's rooms are located in Terminal 1 and Terminal 2. You can find lactation rooms in Terminals 1 and 2.
  • If you have questions or need assistance at Chicago O'Hare International Airport (ORD), you need not worry. There are four information desks to assist. One is in Terminal 2 near gates B7 and C18, Terminal 2 near gate F1D, Terminal 3 at gate K2, and Terminal 5 on the Upper Ticketing Level and lower Arrivals.
  • If you want to freshen up before your meeting, there are shower facilities at Chicago O'Hare International Airport. You can use either shower at Admirals Club in Terminal 3 near Concourse H, Hilton Athletic Club, or at United Polaris Lounge in Terminal 1 near Concourse C.

Prefer to fly direct from Ontario to Chicago O'Hare Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Ontario to Chicago O'Hare Intl.
Find which airlines fly direct from Ontario Airport to Chicago O'Hare Intl Airport, which days they fly and book direct flights.

Direct departures

Ontario to Chicago O'Hare Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Chicago O'Hare Intl to Ontario

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 5 airlines serving from Ontario to O'Hare Intl

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Chicago. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to O'Hare Intl? 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
SouthwestOverall score based on 4235 reviews
8.0Comfort
8.6Crew
8.1Boarding
7.0Food
7.5Entertainment
Airline reviews

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

10.0 ExcellentMichael, Nov 2025LAX - BWI
Read more Southwest reviews

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Excellent. Would encourage Southwest to keep current boarding procedures with free style seating. Makes for a fantastic experience

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

It was okay. The plane was delayed from earlier in the day, but they kept updating the departure time, sometimes later, sometimes earlier. That was stressful. Once we finally got on and took off, it was fine. I was supposed to have a connection in Chicago to Los Angeles, and the time for so late I was rebooked to arrive in LA 3 hours late. The departure time to Chicago later became early enough to have taken my original connection and arrive earlier but that wasn't an option.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Cramped seating for me. Luckily it wasn’t a long flight

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

Excellent experience. Starting with the agent at the Premier bag drop who noticed I was very early for my scheduled flight and offered to rebook me on an earlier flight with my seat preference. She would not let me leave the counter until she knew that all of the changes and new boarding pass showed up on my United app. At the gate, the flight boarded quickly such that we departed early and the flight was smooth. We arrived 20 minutes early at ORD and I was able to be home in time for dinner. One of the best flights I've had.

Salina to travers city was great! But the sept 24 Tranverse city was not! Traverse city to chichago was cancelled, i went to Denver & got to Salina 6 hours later!

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Flight attendant in first class gave poor service (like he didn't want to be there) and food was awful. We sat waiting for gate upon arrival over 45 mins.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

I enjoyed the extra leg room compared to other airlines. The first stewards made my daughter’s birthday special by giving her an extra snack. Then the last one coming home from Chicago to Appleton made our night really enjoyable Thanks for making our trip enjoyable

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

It was a typical flight. We had a delay which seems to be the normality now. And we had no in flight service due to conditions.

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

Terrible. Flight delayed for more than 8 hours with only a $12 meal voucher provided for the inconvenience. The airplane did not have breaks on arrival yet they still made us go through the motions and board on time knowing we could not take off then sit for 40+ minutes before having to get of the time. A complete waste of my time. I cannot believe they can stay business with these shenanigans. I’ll avoid this company like the plague moving forward as the lack of accountability is disgraceful.

This was the best 2 flights I have had with American out of SGF. Great crew both flights.

Excellent - explanations were clear staff was nice and flight was comfortable

Lost bag and 2 days no word leaving for cruise no clothes or stuff

Any flight to ORD after about 2pm this summer has been challenging. Flight was delayed getting in (coming from ORD) and that led to it not leaving before a ground stop due to lightening before they could fuel the plane, and so forth. They made up some time but we were still late in arriving at ORD, and that led to missed connections.

Food was ok, but not as good as I have had before on AA.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

The single worst check in experience I could imagine. I’ll never do any business with Frontier or any affiliated company

Too many extra fees, uncomfortable, little leg room. Will not recommend this airline.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

Severe turbulence. Captain never came on to reassure passengers after things settled down.

We were delayed three times ,and that destroyed my plans, and reservations

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

The crew was delayed because they came on another flight that was delayed due to weather 10pm flight left at 1.30 am The airline made no effort to align alternate crew

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

Everything you need to know for your flight from Ontario to O'Hare Intl

Information on your arrival and departure airports