ONT - KOA

$144 Find Cheap Flights from Ontario to Kailua-Kona

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 Kailua-Kona departing on 4/28. 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 Kailua-Kona

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

Cheapest round-trip
$284
Overall average: $465
Delta
Wed 4/15Thu 4/23
ONT - KOA • 1 stop
Cheapest one-way
$144
Overall average: $300
Multiple Airlines
Tue 4/28
ONT - KOA • 1 stop
Top airlines
Delta
Cheapest • from $284 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Ontario and Kailua-Kona. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Seattle (SEA)
Cheapest • Avg $447 (round-trip)
San Francisco (SFO)
Shortest trip • 8h 33m (one-way)
Insights
Insights
Insights
Insights
When to book
5 weeks
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 55% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 26% price drop
May
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 Kailua-Kona!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Kailua-Kona (ONT-KOA)

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

Wed, Apr 15 - Thu, Apr 23
Delta Logo
7:00 am - 7:03 pm
ONT
-
KOA
15h 03m
1 stop
Delta Logo
8:50 pm - 11:13 am
KOA
-
ONT
11h 23m
1 stop
$284Delta
Wed, Apr 15 - Thu, Apr 23
Delta Logo
6:00 am - 7:03 pm
ONT
-
KOA
16h 03m
2 stops
Delta Logo
8:50 pm - 11:13 am
KOA
-
ONT
11h 23m
1 stop
$290Delta
Tue, May 5 - Tue, May 12
Alaska Airlines Logo
10:39 am - 7:52 pm
ONT
-
KOA
12h 13m
1 stop
Alaska Airlines Logo
10:36 am - 11:48 pm
KOA
-
ONT
10h 12m
1 stop
$296Alaska Airlines
Tue, May 5 - Thu, May 7
Delta Logo
7:00 am - 7:03 pm
ONT
-
KOA
15h 03m
1 stop
Delta Logo
8:55 pm - 12:19 pm
KOA
-
ONT
12h 24m
2 stops
$302Delta
Tue, May 5 - Thu, May 7
Delta Logo
6:00 am - 7:03 pm
ONT
-
KOA
16h 03m
2 stops
Delta Logo
8:55 pm - 12:19 pm
KOA
-
ONT
12h 24m
2 stops
$307Delta
Sat, Apr 18 - Thu, Apr 23
Delta Logo
6:00 am - 7:03 pm
ONT
-
KOA
16h 03m
2 stops
Delta Logo
8:50 pm - 11:13 am
KOA
-
ONT
11h 23m
1 stop
$315Delta
Tue, Mar 17 - Tue, Mar 24
Multiple Airlines Logo
12:02 pm - 10:05 pm
ONT
-
KOA
13h 03m
1 stop
Multiple Airlines Logo
12:17 pm - 10:59 pm
KOA
-
ONT
7h 42m
1 stop
$317Multiple Airlines
Thu, Apr 16 - Wed, Apr 22
Delta Logo
6:00 am - 7:03 pm
ONT
-
KOA
16h 03m
2 stops
Delta Logo
8:50 pm - 11:44 pm
KOA
-
ONT
23h 54m
2 stops
$318Delta
Wed, Apr 15 - Wed, Apr 22
Delta Logo
7:00 am - 7:03 pm
ONT
-
KOA
15h 03m
1 stop
Delta Logo
8:50 pm - 11:44 pm
KOA
-
ONT
23h 54m
2 stops
$323Delta
Thu, Apr 16 - Thu, Apr 23
Multiple Airlines Logo
10:33 am - 5:31 pm
ONT
-
KOA
9h 58m
1 stop
Multiple Airlines Logo
7:05 am - 9:10 pm
KOA
-
ONT
11h 05m
1 stop
$330Multiple Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Kailua-Kona flights

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

What is the cheapest month to fly from Ontario to Kailua-Kona?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Kailua-Kona, 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 Kailua-Kona is January, where tickets cost $370 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $704 and $611 respectively.

How far in advance should I book a flight from Ontario to Kailua-Kona?

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 Kailua-Kona, 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 Kailua-Kona, you should book around 5 weeks before departure, which saves you about 55% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$144
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly with an average 6% increase in price.
Flight from Ontario to Kailua-Kona

When to book flights from Ontario to Kailua-Kona

Are your dates flexible? Find out the best times to travel from Ontario to Kailua-Kona 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 Kailua-Kona

  • What is the cheapest flight from Ontario to Kailua-Kona?

    In the last 3 days, the lowest price for a flight from Ontario to Kailua-Kona was $144 for a one-way ticket and $284 for a round-trip.

  • Do I need a passport to fly between Ontario and Kailua-Kona?

    No

  • Which aircraft models fly most regularly from Ontario to Kailua-Kona?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Kailua-Kona?

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

  • Which is the best airline for flights from Ontario to Kailua-Kona, Alaska Airlines or Southwest?

    The two airlines most popular with KAYAK users for flights from Ontario to Kailua-Kona are Alaska Airlines and Southwest. With an average price for the route of $508 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Southwest is also a great choice for the route, with an average price of $560 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Ontario to Kailua-Kona?

    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 Kailua-Kona.

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

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

    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 Kailua-Kona with an airline and back to Ontario with another airline. Booking your flights between Ontario and KOA 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 Kailua-Kona?

    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 Kailua-Kona from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Ontario to Kailua-Kona

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Kailua-Kona. 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 Kailua-Kona? 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
Alaska AirlinesOverall score based on 11965 reviews
7.8Comfort
7.0Entertainment
8.1Boarding
7.1Food
8.5Crew
Airline reviews

Our flight when we finally got rerouted to a different destination than we were going was fine. But 2 days was taken out of our vacation because our flit was cancelled. We understand mechanical problems and of course don’t want to be on a plane that has mechanical problems.Wish there had been another solution.

10.0 ExcellentAnonymous, Feb 2026
LAX - LIH
Read more Alaska Airlines reviews

Our flight when we finally got rerouted to a different destination than we were going was fine. But 2 days was taken out of our vacation because our flit was cancelled. We understand mechanical problems and of course don’t want to be on a plane that has mechanical problems.Wish there had been another solution.

The bathroom trash container under the sink fell out and was like that long before my flight. The plane smelled of canned fish and floor was Deteriorating

I behave had better flights this one was old and poor

See previous. It was the flight from Honolulu to Kapalua that was cancelled.

It was fine. It was a 30 minute flight so there was water or fruit juice and no food. Which was totally fine. The check in, gate and flight crew were all excellent.

I didn’t order food so can’t really say how it was. Overall, it was a great experience.

Flight was delayed 14 hours! We missed an entire day of our vacation and had to pay for hotel that we didn’t use

Glad they offer free meal, & I got a complimentary drink I’d like coffee,tea, or water offered 3/4 into trip

Could not check in online. Called airline twice, thinking Hawaiian Airlines could check me in during phone call. NO. In 2nd phone call, Customer Service explained that due to “transition period” of Hawaiian Airlines/Alaska Airlines merger, I could only check in at the airport. In addition, flight to Kahului was late at arrival gate; I made connection to Lihue but my bag did not, so I had to return to Lihue airport a couple hours after my arrival to retrieve the bag.

I liked that internet connection while in flight was available.👍

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

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

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

The wifi on the plane is great. The only issue that I have is that I prefer an aisle seat and on my trips this week, I was either in the middle or window. If we can work to secure aisle seating, I will be thrilled. Nice trip.

Great flight but super high price. Glad it was a business trip and not personal

3 hour delay. Had to change plans and was still delayed.

We got exit row seats both flights. Everything was running on time

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

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.

Awesome! On time flight, early arrival, and a complimentary upgrade!

First class and monitors weren’t working for mine & my husbands. Eventually fixed, but quite annoyed as we bought first class. Also, No foot rests.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

The flight crew where really good. Better then the crew from BNE to SFO

left on time, reasonable boarding process arrived early luggage came out quickly

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

Everything you need to know for your flight from Ontario to Kailua-Kona

Information on your arrival and departure airports