ONT - CHI

$84 Find Cheap Flights from Ontario to Chicago

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 Chicago departing on 8/22. 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

 
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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$280
Typical prices: $523-$330
Frontier
Wed 5/27Sun 5/31
ONT - ORD • 1 stop
Cheapest non-stop
$287
Typical prices: $531-$275
United Airlines
Sat 8/15Mon 8/17
ONT - ORD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers extra legroom on flights.
MDW's Orange Line provides a quick ride to downtown.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $280 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Southwest and United Airlines. Average duration is 3h 57m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest • 12% average savings
Most popular
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $255 (round-trip)
Shortest trip • 5h 30m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 38% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 35% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Chicago!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Ontario to Chicago (ONT-CHI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Chicago 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 Chicago

Wed, May 27 - Sun, May 31
Frontier Logo
8:06 pm - 11:01 pm
ONT
-
ORD
24h 55m
1 stop
Frontier Logo
9:37 pm - 11:49 pm
ORD
-
ONT
28h 12m
1 stop
$280Frontier
Mon, Jun 1 - Thu, Jun 4
Frontier Logo
6:00 am - 8:32 pm
ONT
-
ORD
12h 32m
1 stop
Frontier Logo
5:11 pm - 10:05 am
ORD
-
ONT
42h 54m
2 stops
$281Frontier
Tue, Sep 8 - Thu, Sep 17
Delta Logo
12:00 pm - 9:46 pm
ONT
-
MDW
7h 46m
1 stop
Delta Logo
10:35 am - 6:01 pm
MDW
-
ONT
9h 26m
1 stop
$282Delta
Mon, Aug 24 - Tue, Aug 25
Delta Logo
9:43 am - 6:19 pm
ONT
-
ORD
6h 36m
1 stop
Delta Logo
5:28 am - 10:42 am
ORD
-
ONT
7h 14m
1 stop
$282Delta
Wed, Jun 3 - Sat, Jun 6
United Airlines Logo
6:39 pm - 4:58 am
ONT
-
ORD
8h 19m
1 stop
United Airlines Logo
8:18 pm - 10:51 pm
ORD
-
ONT
4h 33mnonstop
$283United Airlines
Tue, Jul 7 - Wed, Jul 8
Delta Logo
9:40 am - 9:52 pm
ONT
-
ORD
10h 12m
2 stops
Delta Logo
3:22 pm - 9:50 pm
ORD
-
ONT
8h 28m
1 stop
$284Delta
Mon, Jun 8 - Tue, Jun 9
Southwest Logo
8:45 pm - 5:10 am
ONT
-
MDW
6h 25m
1 stop
Southwest Logo
6:40 pm - 10:45 pm
MDW
-
ONT
6h 05m
1 stop
$293Southwest
Mon, Jun 1 - Thu, Jun 4
Southwest Logo
11:55 pm - 5:40 am
ONT
-
MDW
3h 45mnonstop
Southwest Logo
5:20 am - 9:05 am
MDW
-
ONT
5h 45m
1 stop
$297Southwest
Thu, Aug 20 - Sun, Aug 23
Multiple Airlines Logo
11:43 am - 8:45 pm
ONT
-
RFD
7h 02m
1 stop
Multiple Airlines Logo
9:35 pm - 3:09 pm
RFD
-
ONT
19h 34m
1 stop
$358Multiple Airlines
Thu, Sep 10 - Sun, Sep 13
Multiple Airlines Logo
11:16 am - 8:39 pm
ONT
-
RFD
7h 23m
1 stop
Multiple Airlines Logo
9:29 pm - 10:21 am
RFD
-
ONT
14h 52m
1 stop
$376Multiple Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Chicago flights

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

How much is a round-trip flight from Ontario to Chicago?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Ontario to Chicago departing in May.

What is the cheapest Ontario to Chicago flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Ontario to Chicago costs $298 on the route between Ontario (ONT) and Chicago O'Hare Intl Airport (ORD). Over the past month, this route was, on average, 12% cheaper than other Ontario-Chicago routes. It is also the most popular route.

What’s the cheapest day of the week to fly from Ontario to Chicago?

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

Your flight ticket price will generally be cheaper if you fly to Chicago on a Wednesday and more expensive on a Sunday. On your return trip to Ontario, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

What is the cheapest month to fly from Ontario to Chicago?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Chicago, 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 is April, where tickets cost $88 (return) on average. On the other hand, the most expensive months are March and February, where the average cost of round-trip tickets is $186 and $177 respectively.

Can I save money by flying with a layover from Ontario to Chicago?

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $475 on average.

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

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, 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, you should book around 4 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to Chicago

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines, ORD and MDW

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.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Jennifer Simonson

Jennifer Simonson

Expert on ONT

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.

Good to know

Low seasonJanuary
Cheapest flight$84
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Ontario to Chicago O'Hare Airport

When to book flights from Ontario to Chicago

Are your dates flexible? Find out the best times to travel from Ontario to Chicago 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 flights from Ontario to Chicago

  • Which is the best arrival airport if I want to visit the Museum of Science and Industry?

    ORD offers the best linkage to The Museum of Science and Industry, which lies approximately 24.2 miles away. Bus line 6 provides the most convenient connection to this attraction, covering the journey in about 1h 18min. For a quicker connection, take a taxi and get there in under 30min.

  • Is there a prayer room at Chicago Midway International Airport (MDW)?

    Religious souls landing at MDW from ONT and want to thank the Almighty for the safe trip will find a sacred suite where they can retreat quietly and respectfully. You can locate this sanctuary in Concourse C on the mezzanine level, and it’s open 24/7.

  • Are there car rentals from O'Hare International Airport (ORD) to downtown Chicago?

    There’s a wide range of car rental services at ORD, ideal for anyone keen to explore Chicago in a car. Once you land at the airport, locate your car dealer’s desk in the arrival hall. A free shuttle will drop you at the pick-up point at Routes Car & Truck Rentals at 3901 Mannheim Rd, Schiller Park.

  • Does O'Hare International Airport run an art program?

    ORD boasts an extensive exhibition of unique pieces of art and crafts throughout its terminals. Consider killing time in concourses B and C and enjoy the various sculptures, murals, and paintings.

  • What is the cheapest flight from Ontario to Chicago?

    In the last 3 days, the lowest price for a flight from Ontario to Chicago was $84 for a one-way ticket and $280 for a round-trip.

  • Do I need a passport to fly between Ontario and Chicago?

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

  • Which airports will I be using when flying from Ontario to Chicago?

    On your way to Chicago, you’ll fly out from Ontario. You’ll be landing in one of Chicago’s 2 airports: Chicago Midway or Chicago O'Hare Intl.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Chicago?

    JetBlue, Alaska Airlines, Delta, Hawaiian Airlines, and American Airlines offer inflight Wi-Fi service on the Ontario to Chicago flight route.

  • Which aircraft models fly most regularly from Ontario to Chicago?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Ontario to Chicago flight route.

  • Which airline alliances offer flights from Ontario to Chicago?

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

  • On which days can I fly direct from Ontario to Chicago?

    There are nonstop flights from Ontario to Chicago 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 $491 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 $446 and an overall rating of 7.9.

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

    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.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago 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?

    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 with an airline and back to Ontario with another airline.

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

    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 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

  • Looking for a cheap flight? 25% of our users found flights on this route for $223 or less one-way and $425 or less round-trip.
  • Ontario International Airport (ONT) is a hub of multiple licensed car and shuttle operators providing services to several destinations within and beyond this establishment. Many run counters at the passenger terminals, parking lots, and car rental centers. Still, most of the nearby airport hotels offer courtesy shuttles to and from the airport.
  • Those who intend to leave ONT for Chicago early in the morning will find it helpful if they spend a night in one of the hotels near Ontario International Airport (ONT). Usually, such properties offer complimentary cars to and from the departure terminal, thus enabling you to be there in time for your voyage. La Quinta Inn & Suites by Wyndham Ontario Airport guarantees that stay.
  • If you’re departing from Ontario International Airport (ONT) to Chicago, remember that the establishment has three terminals. If you're using United Airlines, you’ll leave via Terminal 2, while Terminal 4 serves Southwest Airlines. Movement from one terminal to the other is via an Inter-Terminal Shuttle, which runs every 5-10min on the landside.
  • Those flying aboard American Airlines from ONT to Chicago should know that the carrier runs its hub at Chicago O'Hare International Airport (ORD). Passengers arrive at ORD via Terminal 3 and can retreat to the Admirals Club in the same terminal, Airside. Members and registered cardholders enjoy priority access and clearance under the fast lane program. Still, Economy Class travelers can enjoy the suite after paying for the day’s pass.
  • Southwest Airlines allows passengers from Ontario International Airport (ONT) to Chicago to bring their furry friends into the cabin. Usually, these four-legged friends are household animals such as cats, dogs, and birds. The pets must bear their valid medical certificates and remember to lock them in their kernels throughout the trip.

Prefer to fly direct from Ontario to Chicago?

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

Direct departures

Ontario to Chicago

Monday

Southwest,United Airlines

Southwest,United Airlines

Tuesday

Southwest,United Airlines

Southwest,United Airlines

Wednesday

Southwest,United Airlines

Southwest,United Airlines

Thursday

Southwest,United Airlines

Southwest,United Airlines

Friday

Southwest,United Airlines

Southwest,United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Southwest,United Airlines

Southwest,United Airlines

See more direct flights

Direct returns

Chicago to Ontario

Monday

Southwest,United Airlines

Southwest,United Airlines

Tuesday

Southwest,United Airlines

Southwest,United Airlines

Wednesday

Southwest,United Airlines

Southwest,United Airlines

Thursday

Southwest,United Airlines

Southwest,United Airlines

Friday

Southwest,United Airlines

Southwest,United Airlines

Saturday

Southwest,United Airlines

Southwest,United Airlines

Sunday

Southwest,United Airlines

Southwest,United Airlines

See more direct flights

Reviews of the top 5 airlines serving from Ontario to Chicago

 
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 Chicago? 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 4298 reviews
8.1Boarding
8.0Comfort
7.5Entertainment
8.6Crew
7.0Food
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

For the first time in a long time, the Wi-Fi actually worked the entire flight! The flight crew was amazing as usual.

Great flight. I didn't get a drink because I was asleep whole on the flight.

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

It was good from LAX to Phoenix, But the connection in Phoenix to Tulsa was not that great. The staff on both flights were great. The choice of free entertainment was ok nothing to brag about. The 45 min delay because of some electrical issue wasn't great from Phoenix to Tulsa. We sat there with hardly any air, The seat I had was between windows so the side of the plane pushed in on you. My being a bigger man it then made the seating area uncomfortable. The seats on the plane had no power to connect to recharge your phone or anything. I would recommend that they should look into a slot or clamp to hold your phone to enjoy while watching the entertainment choices hands-free. Also make it possible to raise the inner seat by the window be able to raise the arm rest up to make more room for larger people to set more comfortably. I would also say other then that stop price gouging the airfare or nickel and diming everything. Not fair for people having to fly for emergencies and be paying for higher prices due to the season or holidays. Your making your money either way and the cost of flying is still going to be the same regardless if there's 100 people or 200 people.

Love them will get a Southwest card to track my points and keep flying with them. My family and I were pleased with the services.

While they turned off most cabin lights to allow people to sleep, I was bothered by how bright the side lights still were. It was still quite bright for me in a window seat, when I wish I could have slept!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

N Everything was perfect from boarding to assistance to baggage in Tampa

Loved the crew! Sucks that we went from 1 hour and 8 minute layover to a 3 hour layover. But weather sucks like that.

Fast, lovely scenery, great info on the Delta flight screen about landmarks we were flying over. Great landing!

Long flight but comfortable and not freezing as I have experienced on Hawaiian flights to the islands. They gave us blankets just in case. Nice touch.

I took seat 15A in anticipation of window seat, there is no window.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was significantly delayed. The inbound flight from EWR was delayed departing because of mechanical problems. My original departure from CLT was 5:28 pm but due to the delay of the inbound flight, after arrival, deplaning, cleaning, boarding, we did not push back from the gate until 9:00 pm. Once in the air, the flight was smooth and what was originally supposed to be an arrival in ORD at 7:30 pm local time turned out to be 9:35 pm.

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

Very comfortable flight, snacks and drinks were good, good communication from crew. Could have used a little more information on timing of boarding for group 5

Great flight. Got to watch a movie. Smooth flight and early arrival at ORD.

It was better than excellent. The staff in Mason City were great. The young woman that pushed my wheelchair did more than could be expected of her. She came from India 17 years ago. I don't remember her name.

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

The staff and service on American Airlines were truly outstanding. I had requested wheelchair assistance for my mother due to her knee issues, and the team went above and beyond every step of the way—from boarding in Boston to our arrival in Chicago. Their care, professionalism, and attentiveness made the entire experience smooth and stress-free. I’m very grateful for the support they provided.

The new planes (American Eagle) are beautiful and especially comfortable. The flight attendants are consistently professional and courteous. And, while it may seem inconsequential, the new liquid tube of coffee creamer—in contrast to the powdered coffee creamer—makes all the difference in a cup of coffee.

I'm not sure American is capable of on-time arrivals and departures. When you land at ORD, you almost always get held on the tarmac because your gate is still occupied. I may have missed my connection, but that ended up up being significantly delayed as well. Once again, I finally got home well after midnight.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

Crew at the gate was very crabby and not at all polite. The plane was very hot the entire flight. And the seat cushion was very worn out.

The staff are very, very professional. It's what flying should feel like.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

Delays with no explanation. It could have been handled better.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

They didn’t offer a water, even after I asked

Remind customers of the need to have passport or new ID for boarding.

The flight never took off and we spent 7 hours at the airport

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

This company socks. It's fraud. They canceled our flight yesterday, and today we were late because of a really long line at the check in bag. At the rebook station, there was ton of people. The workers were all rude. I am gonna make a report to FTC.

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

Everything you need to know for your flight from Ontario to Chicago

Information on your arrival and departure airports