ONT

Find First Class Flights to Ontario - Compare and Save

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Cheap First Class Flight Deals to Ontario

 
These are the cheapest deals for flights from the United States to Ontario currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. 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 first class round-trip flight deals to Ontario

Tue, Aug 4 - Tue, Aug 11
United Airlines Logo
10:40 am - 12:12 pm
SFO
-
ONT
1h 32mnonstop
United Airlines Logo
6:08 am - 7:35 am
ONT
-
SFO
1h 27mnonstop
$337United Airlines
Sat, Aug 8 - Fri, Sep 11
United Airlines Logo
10:40 am - 12:12 pm
SFO
-
ONT
1h 32mnonstop
United Airlines Logo
1:56 pm - 3:25 pm
ONT
-
SFO
1h 29mnonstop
$367United Airlines
Tue, Aug 11 - Mon, Aug 24
United Airlines Logo
6:30 pm - 8:01 pm
SFO
-
ONT
1h 31mnonstop
United Airlines Logo
6:00 am - 7:27 am
ONT
-
SFO
1h 27mnonstop
$369United Airlines
Tue, Aug 4 - Thu, Aug 6
United Airlines Logo
9:00 pm - 10:37 pm
SFO
-
ONT
1h 37mnonstop
United Airlines Logo
1:50 pm - 3:15 pm
ONT
-
SFO
1h 25mnonstop
$381United Airlines
Wed, Sep 23 - Wed, Oct 28
Alaska Airlines Logo
8:23 am - 11:16 am
SEA
-
ONT
2h 53mnonstop
Alaska Airlines Logo
2:13 pm - 4:58 pm
ONT
-
SEA
2h 45mnonstop
$537Alaska Airlines
Wed, Sep 23 - Wed, Oct 28
Alaska Airlines Logo
8:35 am - 5:18 pm
SEA
-
ONT
8h 43m
1 stop
Alaska Airlines Logo
11:13 am - 2:02 pm
ONT
-
SEA
2h 49mnonstop
$557Alaska Airlines
Thu, Aug 27 - Sat, Sep 5
Delta Logo
7:55 am - 12:16 pm
DFW
-
ONT
6h 21m
1 stop
Delta Logo
12:00 pm - 9:56 pm
ONT
-
DFW
7h 56m
1 stop
$657Delta
Fri, Aug 28 - Sun, Sep 6
Delta Logo
6:12 pm - 11:34 pm
DFW
-
ONT
7h 22m
1 stop
Delta Logo
6:00 am - 1:30 pm
ONT
-
DFW
5h 30m
1 stop
$765Delta
Sun, Aug 30 - Wed, Sep 2
American Airlines Logo
5:00 am - 9:34 am
IAH
-
ONT
6h 34m
1 stop
American Airlines Logo
2:27 pm - 10:20 pm
ONT
-
IAH
5h 53m
1 stop
$797American Airlines
Mon, Aug 31 - Fri, Sep 4
American Airlines Logo
5:00 am - 9:34 am
IAH
-
ONT
6h 34m
1 stop
American Airlines Logo
12:59 pm - 8:19 pm
ONT
-
IAH
5h 20m
1 stop
$841American Airlines

Good to Know - First Class Flights to Ontario

Low seasonDecember
Good deal one-way$536
Best time to beat the crowds with an average 60% drop in price.
Most popular time to fly and prices are also 8% lower on average.
or less

When to book first class flights to Ontario

Are your dates flexible? We break down the daily and monthly prices for first class flights to Ontario, so you can find the best time to fly.
Average price per month
To calculate monthly average prices, KAYAK takes all prices for each month over the last year for first class flights to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all the values for each month.
Flight prices as travel date approaches
To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for first class flights to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.

FAQs for Ontario first class flights

  • How long is a flight to Ontario?

    Flights from Oakland1h 21m
    Flights from Las Vegas1h 08m
    Flights from New York John F Kennedy Intl Airport5h 43m
    Flights from Portland2h 22m
    Flights from Sacramento1h 22m
  • What is the most popular airline offering First Class flights to Ontario?

    Among KAYAK users, American Airlines is the most popular airline offering First Class seats on flights to Ontario.

  • Which airlines offer First Class tickets on flights to Ontario?

    Traveling to Ontario and want to offer yourself a First Class experience? Depending on the origin, the following airlines offer seats in First Class: American Airlines, United Airlines, Alaska Airlines and Delta.

  • How does KAYAK find such good deals on First Class tickets to Ontario?

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

  • What is the best airline for first class flights to Ontario?

    The highest-rated airline by KAYAK users offering first class flights to Ontario is Southwest, with an overall rating of 8.0.

Top tips for finding first class flights to Ontario

  • What’s a good price for a first class ticket between United States and Ontario? 25% of our users found flights on this route for $536 or less one-way and $1,310 or less round-trip.
  • Try flying direct if you’re looking to save, as direct first class tickets are cheaper on average.

Reviews of the top 5 airlines flying to Ontario

 
See real verified KAYAK customer reviews for airlines flying to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from the United States to Ontario. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly first class to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4249 reviews
8.0Comfort
8.1Boarding
7.5Entertainment
7.0Food
8.6Crew
Airline reviews

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

2.0 MediocreIrene, Jun 2026
DEN - SFO
Read more Southwest reviews

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

It was just okay, no frills, basic transportation with no luxury. No screens on the seats, no water or drinks on a short flight. Full flight but at least it was on time.

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

No gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

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

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

Our flight to Oakland was great bc the plane was new but it was delayed by 15min not bad at all. Over all it was an 8/10

The flight in it self was good. The delays looking for pilots was unexpected.

The first class flight attendant was awful to everyone. Very rude; no customer service. She should not be working in first class.

Smaller plane for a longer flight than my first one. Doesn’t make sense.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

The whole experience was excellent. As it most often is with Delta

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

Very Very late. Subsequent flights left an hour before ours

First flight out and was 85 minutes delayed. Notification came out way too late

Delta flights recently are always delayed AND at jfk tney get the gates further away (need To walk 20’ to get to them/all the way at the end of the terminal). Not sure whats happening but price doesnt match experience!

bulkhead seat had very little legroom - even in bsiness class.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

I'm a United 1K member and have ben for 10 years. The gate agent had no control over the boarding process and had us passengers queued for hours as delays were announced. On the plane, the overhead air nozzle was broken so col over was powering through on me and the passenger next to me. Not a great experience for a million miler on United. Feel free to contact me. Josh Smigel - DM426089

3 hour delay…. Nearly 2 hours sitting on tarmac. Do better, United. Or at least have the sense to not say “we hope you enjoyed your flight with us” upon disembarking.

Airport terminal was outdated, flight was on a small jet with no wifi

Flight was late - I was downgraded from first class to coach

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

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

Delays!!! Serious delays. I was told by a member of staff in LGA that I would miss my DEN to LAX flight connection, so I was put on a later flight. Due to delays I would have been able to have made my original flight, where I was sat in business class - seat 1A: I was put on my original flight but bumped from business - 1A to economy 33C. I want a refund for paying business class but only flying economy

Marked by flight delays on all segments of the trip. Food in first class cabin was mediocre and overhead cabin storage was not adequate. Overall, the premium charge for first class cabin was poor and over hyped. This will be our last flight with UA.

the plane was old. the wifi didn’t work. the entertainment was boring and dated. the charging ports were impossible to find. i was mostly ignored by flight attendants that had no problem speaking to the man beside me. i got two drinks the entire time i was on the plane.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

Amazing I love American. I’ll never fly anyone else if I can help it.

Cancelled and rebooked twice in one day with a drop in seat class. Not good at all.

Service in first class no longer exists on American Airlines .

Customer service in first class does not exist on American Airlines

First class flight attendant was rude and lacked any customer service skills.

Customer service for American Airlines first class is at an all time low.

Airplane was cold. Flight attendants were rude. Phone charger did not work. No food available.

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

It was fine. I didn't love the food but it was at least a real attempt at serving a meal, unlike my earlier flight from Nashville to Dallas.

I really didn't like anything. Paid for my checked luggage online ($79) and then was told that I would have to paid another $79 for my carry on. Was not allowed to enter the terminal until 3 hours before my flight and when I finally was allowed to check my bag and enter, my flight was delayed 3 times. When I finally landed, we were all instructed to "run off the plane" as they had to do a quick turn around to Las Vegas. Me and several of my flying companions will never fly Frontier again.

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 was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Flight was cancelled and was not able to get another flight thru Frontier. Per frontier a refund was issued but I do not see a refund on my Afirm account.

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

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

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

Everything you need to know for your flight to Ontario

Information on your arrival and departure airports