ONT - KOA

$162 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 2/24. 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
41,299,237 searches in the past 7 days on KAYAK

Save 23% 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
$322
Overall average: $550
Multiple Airlines
Tue 3/3Wed 3/4
ONT - KOA • 1 stop
Cheapest one-way
$162
Typical prices: $245-$252
Multiple Airlines
Tue 2/24
ONT - KOA • 1 stop
Top airlines
American Airlines
Cheapest • from $332 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
5 weeks
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 53% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 22% 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

Tue, Mar 3 - Wed, Mar 4
Multiple Airlines Logo
12:02 pm - 10:57 pm
ONT
-
KOA
12h 55m
1 stop
Multiple Airlines Logo
6:00 am - 10:15 pm
KOA
-
ONT
14h 15m
1 stop
$322Multiple Airlines
Tue, Mar 3 - Wed, Mar 4
Multiple Airlines Logo
8:41 am - 4:58 pm
ONT
-
KOA
10h 17m
1 stop
Multiple Airlines Logo
9:01 pm - 10:15 pm
KOA
-
ONT
23h 14m
1 stop
$324Multiple Airlines
Wed, May 6 - Wed, May 13
Multiple Airlines Logo
8:30 am - 8:26 pm
ONT
-
KOA
14h 56m
1 stop
Multiple Airlines Logo
11:46 am - 11:56 pm
KOA
-
ONT
9h 10m
1 stop
$328Multiple Airlines
Thu, Feb 26 - Thu, Mar 5
Multiple Airlines Logo
12:02 pm - 10:57 pm
ONT
-
KOA
12h 55m
1 stop
Multiple Airlines Logo
7:09 am - 10:15 pm
KOA
-
ONT
13h 06m
1 stop
$330Multiple Airlines
Tue, Mar 3 - Wed, Mar 11
American Airlines Logo
6:15 am - 4:14 pm
ONT
-
KOA
11h 59m
1 stop
American Airlines Logo
9:40 pm - 8:51 am
KOA
-
ONT
8h 11m
1 stop
$332American Airlines
Mon, Mar 2 - Mon, Mar 9
United Airlines Logo
1:50 pm - 8:51 pm
ONT
-
KOA
9h 01m
1 stop
United Airlines Logo
10:55 pm - 12:18 pm
KOA
-
ONT
10h 23m
1 stop
$334United Airlines
Tue, Mar 3 - Wed, Mar 11
Delta Logo
6:00 am - 7:39 pm
ONT
-
KOA
15h 39m
2 stops
Delta Logo
7:40 pm - 12:23 pm
KOA
-
ONT
13h 43m
1 stop
$338Delta
Tue, Apr 7 - Wed, May 13
Delta Logo
6:00 am - 6:38 pm
ONT
-
KOA
15h 38m
2 stops
Delta Logo
8:55 pm - 11:12 am
KOA
-
ONT
11h 17m
1 stop
$340Delta
Tue, Apr 7 - Mon, May 11
Delta Logo
6:00 am - 6:38 pm
ONT
-
KOA
15h 38m
2 stops
Delta Logo
8:55 pm - 12:53 pm
KOA
-
ONT
12h 58m
1 stop
$342Delta
Tue, Mar 3 - Wed, Mar 11
Delta Logo
6:00 am - 7:39 pm
ONT
-
KOA
15h 39m
2 stops
Delta Logo
10:15 pm - 12:23 pm
KOA
-
ONT
11h 08m
2 stops
$343Delta
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 $677 and $550 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 53% 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$162
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 5% 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 $162 for a one-way ticket and $322 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 $507 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 $555 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 5 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 11829 reviews
8.1Boarding
7.8Comfort
8.5Crew
7.0Entertainment
7.1Food
Airline reviews

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

4.0 OkayTimothy, Jan 2026
LAX - OGG
Read more Alaska Airlines reviews

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 first leg of the trip was excellent. Lovely flight attendants and comfortable plane. The second leg left a lot to be desired. The flight attendant was rude when I asked for a Diet Coke, the boarding required quite a long walk and the plane was crammed and uncomfortable.

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.

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

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

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

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

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

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

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

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

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

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.

I boarded flight UA#1318 at Sacramento International Airport going back to Houston TX. The flight was scheduled at 5:10am. I was able to check in virtually using the United Airlines app. When I entered the airport, there was no one outside assisting with checked bags as it was for Delta Airlines. Immediately upon entering, there was a LONG, EXTREMELY LONG line to the kiosks to get boarding passes. I stand in line to get boarding passes then had to move to ANOTHER EXTREMELY LONG line to get my bags checked in. While standing in this line, we noticed an agent taking customers to 3 at a time to her station to check their bags in. Lucky for me, she called me back, checked my bags for me and I was on my way. I then encountered another long line at the TSA check and to avoid I ending up having to sign up for CLEAR to bypass it. So glad, I did.,...Both of my flights were great with no issues, butthe check in progress at Bush Airport was so much smoother. Check-in at SMF airport needs to be anaylzed and corrected. Do better United, I know you can....thanks

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Premium Plus is a really good idea for longer flights

It would be nice to have some low carb options in the snacks.

The entertainment options were at best, fair. It was exactly the same as my outbound flight. It would have been more entertaining if there were some series from Apple TV, HBO, Showtime or other carriers for me to catch up with.

The flight was on time and arrived early. The crew were friendly and helpful.

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

More choices on snacks. Built-in video screen to enjoy entertainment choices.

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

The flight was flawless and we even arrived between 20 and 25 minutes early!

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

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

Information on your arrival and departure airports