SEA - ONT

$109 Find Cheap Flights from Seattle to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Ontario departing on 6/6. 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 Ontario

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

Cheapest round-trip
$143
Typical prices: $277-$168
Frontier
Fri 6/5Mon 6/8
SEA - ONT • Non-stop
Cheapest non-stop
$142
Typical prices: $296-$160
Frontier
Fri 5/29Mon 6/1
SEA - ONT • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
Delta's Comfort Plus offers extra legroom and priority boarding.
Use SpotSaver at SeaTac for faster security screening.
Expert advice
Expert advice
+1
+1
Expert advice
Expert advice
+1
Top airlines
Cheapest • from $143 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines, Delta and Frontier. Average duration is 2h 43m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $191 (round-trip)
Shortest trip • 4h 13m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 28% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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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 Ontario!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Seattle to Ontario (SEA-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Ontario

Fri, Jun 5 - Mon, Jun 8
Frontier Logo
11:51 am - 2:35 pm
SEA
-
ONT
2h 44mnonstop
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
$143Frontier
Wed, May 27 - Thu, May 28
Frontier Logo
7:50 pm - 10:05 am
SEA
-
ONT
14h 15m
1 stop
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
$144Frontier
Thu, May 28 - Sun, May 31
Frontier Logo
11:51 am - 2:35 pm
SEA
-
ONT
2h 44mnonstop
Frontier Logo
11:51 am - 10:36 am
ONT
-
SEA
22h 45m
1 stop
$145Frontier
Tue, May 26 - Thu, May 28
Frontier Logo
7:50 pm - 11:49 pm
SEA
-
ONT
27h 59m
1 stop
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
$146Frontier
Sun, May 24 - Thu, May 28
Frontier Logo
11:51 am - 2:35 pm
SEA
-
ONT
2h 44mnonstop
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
$148Frontier
Thu, May 28 - Thu, Jun 4
Frontier Logo
8:20 pm - 8:04 am
SEA
-
ONT
11h 44m
1 stop
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
$149Frontier
Thu, Jun 4 - Thu, Jun 11
Frontier Logo
11:51 am - 2:35 pm
SEA
-
ONT
2h 44mnonstop
Frontier Logo
4:03 pm - 6:57 pm
ONT
-
SEA
2h 54mnonstop
$152Frontier
Thu, Jun 4 - Fri, Jun 26
Frontier Logo
11:51 am - 2:35 pm
SEA
-
ONT
2h 44mnonstop
Frontier Logo
4:03 pm - 6:57 pm
ONT
-
SEA
2h 54mnonstop
$153Frontier
Fri, May 29 - Sat, Jun 6
Frontier Logo
7:50 pm - 11:49 pm
SEA
-
ONT
27h 59m
1 stop
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
$154Frontier
Mon, May 18 - Thu, May 28
Frontier Logo
7:50 pm - 11:49 pm
SEA
-
ONT
27h 59m
1 stop
Frontier Logo
4:04 pm - 7:05 pm
ONT
-
SEA
3h 01mnonstop
$155Frontier
Booking Insights

KAYAK's insights & trends for Seattle to Ontario flights

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

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

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

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

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

For Seattle to Ontario, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Ontario back to Seattle, the best deals are generally found on Saturday, with Wednesday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle 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 from Seattle to Ontario is October, where tickets cost $187 (return) on average. On the other hand, the most expensive months are February and December, where the average cost of round-trip tickets is $377 and $317 respectively.

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

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 $232, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Ontario, 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 Seattle to Ontario, you should book around 3 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Expert advice

Expert advice for your flight from Seattle to Ontario

 
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
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines and SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Stefanie Waldek

Stefanie Waldek

Expert on Frontier and Delta

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.

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 seasonMarch
Cheapest flight$109
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Seattle to Ontario

When to book flights from Seattle to Ontario

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

Flights from Seattle to Ontario: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Seattle to Ontario 
Verified travelerFlew with Hawaiian Airlines
SEA
-
ONT
Jun 2025
Make sure to be there on time because the bag drop off can be a little complicated and it takes quite some time to get to the gate.
Verified travelerFlew with Alaska Airlines
SEA
-
ONT
Oct 2024
SeaTac lets you make an appointment to get through security. SpotSaver. No cost. Online.

FAQs for booking flights from Seattle to Ontario

  • Does SEA have facilities for disabled traveling passengers?

    You can use the sunflower lanyard program when you're departing from Seattle to Ontario and need assistance at the SEA airport. This program is available to passengers with hidden disabilities who need extra help with check-ins, security screening, and carrying luggage. If you'd like to use the service, you can request sunflower lanyards at the pre-security information desk, between checkpoints 3 and 4, or the post-security information desk in Concourse A.

  • Does Ontario Airport have pet relief areas?

    Once you land in Ontario, you can use the pet relief areas inside and outside the terminals if your pet needs relief. The outside areas are at the far end of the terminal buildings. The areas inside are near gates 210 and 410. The relief areas have waste disposal bags and bins, which you can use to clean after your pet.

  • Is there public transportation available from Ontario Airport?

    Ontario has a well-designed bus and rail transportation service. If you'd like public transport from ONT, you can use the public buses boarded at terminal 2. The buses are available every 20min.

  • Does Ontario Airport have a USO Military Lounge?

    The USO military lounge is a space for military members and their families to sit and relax. Families can access free internet services, entertainment, and food and drinks. The ONT USO lounge is across parking lot F.

  • What is the cheapest flight from Seattle to Ontario?

    In the last 3 days, the lowest price for a flight from Seattle to Ontario was $109 for a one-way ticket and $143 for a round-trip.

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

    No

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

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

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

    The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Seattle to Ontario flight route.

  • Which airline alliances offer flights from Seattle to Ontario?

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

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

    There are nonstop flights from Seattle to Ontario on a daily basis.

  • Which is the best airline for flights from Seattle to Ontario, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Seattle to Ontario are Alaska Airlines and Delta. With an average price for the route of $296 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $272 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Seattle 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 from Seattle to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Seattle 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 Seattle 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 to Seattle with another airline. Booking your flights between Seattle and ONT 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 Seattle 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 from Seattle 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 Seattle to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $119 or less one-way and $197 or less round-trip.
  • Seattle Airport (SEA) has made it easy for travelers departing from the airport and are interested in parking their cars. The airport has a pre-booking system that allows travelers to book a parking spot before arriving at the airport. You can use this feature through the airport's website.
  • When departing to Ontario from Seattle Airport, saving time at TSA screening is a priority. Fortunately, SEA has a service that allows passengers to reserve a screening spot through the SEA Spot Saver. Reservations and walk-in appointments for departing passengers are available from 5 am to 1 pm every day at checkpoints 2, 3, and 5 for all airlines.
  • There are various transport options when you land at Ontario Airport (ONT). You can pick up a rental car from the rental car facility. ONT has airport shuttles that ferry passengers from the terminals to the on-airport rental car center. The shuttles run every 5-20min and are at the Terminal Islands of terminals 2 and 4.
  • Waiting for your flight to Ontario at the Seattle Airport can be overwhelming. You can stay in the sensory room if you need a calming environment to minimize anxiety. The room is at the train level of the A gates STS Station.
  • Every day, people face life challenges. The busyness at the airport, waiting for a flight, going through security, and checking in can add to the stress. Seattle Airport has realized this and has a beautiful therapy dogs service. The airport has partnered with Pet Partners program, where Pet Partners and their trained animals offer animal therapy at the airport. A friendly dog face or hug goes a long way to reducing stress.

Prefer to fly direct from Seattle to Ontario?

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

Direct departures

Seattle/Tacoma Intl to Ontario

Monday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Tuesday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Wednesday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

See more direct flights

Direct returns

Ontario to Seattle/Tacoma Intl

Monday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Tuesday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Wednesday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Thursday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Friday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Saturday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

Sunday

Alaska Airlines,Delta,Frontier

Alaska Airlines,Delta, +1 more

See more direct flights

Reviews of the top 5 airlines serving from Seattle to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Ontario. 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 Seattle to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12324 reviews
8.5Crew
7.1Food
8.1Boarding
7.0Entertainment
7.8Comfort
Airline reviews

See what I wrote in the previous section. This was a terrible experience. I would like refund.. I even paid an extra $70 for an aisle seat closer to the front to ensure that I got off early enough to catch the next flight. The fact that the plane did not wait, and even left eearlier, knowing that the first flight came in late, and was moved to a terminal three train stops away is appalling. My friend that flew JetBlue, their flight was delayed and came in later and the connecting flight WAITED for them. How is it that JetBlue could do that, and Alaska could not.

2.0 MediocreAnna, Apr 2026
SEA - LAX
Read more Alaska Airlines reviews

See what I wrote in the previous section. This was a terrible experience. I would like refund.. I even paid an extra $70 for an aisle seat closer to the front to ensure that I got off early enough to catch the next flight. The fact that the plane did not wait, and even left eearlier, knowing that the first flight came in late, and was moved to a terminal three train stops away is appalling. My friend that flew JetBlue, their flight was delayed and came in later and the connecting flight WAITED for them. How is it that JetBlue could do that, and Alaska could not.

Alaska Airlines staff go out of their way to accommodate my fragile musical instrument, every time. They are unlike any other airline. I've experienced this can-do attitude on several flights with different staff, so this must be the culture of their company. I appreciate Alaska!

It was a bumpy flight but the crew was very attentive and made it a safe and enjoyable experience.

i canceled my flight from SEA to SFO, SNA to SEA and received full refund from Alaska Airlines. i am pleased with the customer service.

Departing flight for our weekend trip was cancelled due to weather which meant our return flight was useless. The whole thing was difficult to get support through but Alaska did recover and was able to reimburse us for the flights yesterday. For some reason, Kayak was not kept in the loop, adding to the confusion.

i canceled my return flight package with Alaska Airlines. Customer Service was excellent and assisted me to cancelled both of our reservations and returned the payment in full. that is excellent service and understanding and empathy of the customers' needs. i like Alaska Airlines and recommend AS to everyone.

The flight attendant was friendly and attentive. Although our interaction was brief—- it made a difference. The crew was upfront about turbulence. I like the Maui pretzels.

I paid for the WiFi and it didn’t work during the whole flight

Great experience, staff and crew were very professional, friendly and helpful!

The ticket I purchased through Kayak did not show up in my Alaska Airlines app, and neither of the codes given to me worked for online check in. I've never had to show up to the airport at 6am wondering if I've been scammed. Cheap flight fare or whatever does not play well with airlines and I will be wary of using Kayak in the future.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

Great flight from Seattle to Phoenix and to Chicago-Midway from Phoenix

The Air hostess were very rude on my flight from Houston to Austin . Their regular communication itself felt a they are shouting at people.

Boarding was easy. The seats are small and fairly uncomfortable

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Mediocre. Boarding is now unpleasant. The employees, once friendly and nice, are now regularly speaking sternly to passengers, badgering them to do things right so they can take off on time and gate check bags because they don't have enough overhead bin space. The pretzel snack was crushed flat and broken into even smaller pieces, which happens frequently lately. Drink service was suspended before they reached my row.

The charges were ridiculous for an hour flight and the turbulence was very scary.

Crew was nice, meal was good. Entertainment had to be rebooted 3 times and still did not work. Turns out there was residue on screen, it needed to be cleaned to prevent the touchscreen buttons from continuously activating. I had entertainment for the last 45 minutes of a 5 hour 45 minute flight. Really unacceptable for first class. Flight attendent indicated your cleaning solution creates this problem. Seems as if this is widely known, you should be using a different product or cleaning better. Really really disappointing which simply added to the wi fi on your planes with reliably never ever works.

Everything went smoothly, although the usual gripes about airline travel were still present: the boarding process is inefficient, the snack selection is limited, and so on. Since there was extra space on the flight, the gate agent rearranged many people's seats to put people on the aisles and windows, leaving the middle seats empty, as much as possible, which was pretty great.

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!

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

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

my mom urmila patel needed a wheelchair which was not available on the curbside. she needed to walk almost 50 meters inside (at the risk of falling) and then had to wait in line to get a wheelchair (this is not ok). Once obtained she had to seat in it for 30-45 minutes for someone to take her in thru the checkin process (which was fairly smooth and easy). the lady who helped her with her checkin process was very courteous and helpful

Staff at the check-in counter were friendly, happy and helpful. They tagged our bags and sent us to “bag drop off” but were not very clear about where that was. The airport was busy we headed off in what we thought was the right direction until a gentleman waved us down and actually came after us. He was the baggage handler for Delta and recognized our “deer in the headlights “ look-he brought us to the right area (which was marked as the Southwest Airlines Drop Off) and sent us on our way. Wonderful guy, low key and working with a big smile on his face. Loved it. Loved him.

Arlene was a great flight attendant. I also liked how one of the other flight attendants gave us a heads up about snacks and asked everyone to remove their headphones when it was their turn to order. Good idea.

Flight delayed two hours , missed connection flight then connection cancelled- horrible experience with hotel

The checking was disaster, the crew wasn't behave well. It took us two hours to check in, after that thr line at the TSA was long, we barely make the flight. Bad airline

There was no wifi available at any price -- the plane did not have wifi equipment. Movie choices were blah - hits from the past; nothing recent. The food was blah airplane food. They should have had Mai Tai drinks available as per the Hawaiian Airlines magazine, but they had none onboard.

I like that if they asked you to checked in a bag at the gate they give you priority to board

The crew at Hawaiian Airlines was fantastic. Kind and hard working. The pilots were great with giving us all the updates to make sure we were informed.

I liked the Starlink WiFi but didn't like how they said they were the only airline to offer a free meal and it turns out to be just a standalone sandwich and then charge for snacks to go with it. Rather have the free snacks like Southwest, but have the option to purchase a decent meal for a 5+ hour flight.

Flight scheduled to take off at 5.55pm but it did not take off until 7pm due to some food delivery delay.

The crew was quite good, they came by often with drinks or to collect trash. But what wasn't nice was the flight was over weigh and several people had to be rebooked. I was questioned whether I should have a seat when I was getting to it. The in-flight entertainment kept buffering and interrupting. And the route took the airplane through high winds which caused us a longer flight

Wasn’t on the flight due to Alaska cancellation…also after all the rerouting, I was going to be on a later flight that left SFO at 7:47pm, which meant an almost 6 hour layover. That same Hawaiian flight was delayed for another 2hours.

I like Hawaiian, it was great that they had good internet connection across the Pacific Ocean, thanks to Star Link satellites. The seating was comfortable, ( I was in economy ). Maybe I missed it, but I only got offered a beverage once. It was a nonstop flight KOA to SMF. I would take it again next time I go that way.

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

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

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

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

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

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

Information on your arrival and departure airports