ONT - KOA

$193 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 5/31. 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
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Everything you should know

Cheapest round-trip
$386
Typical prices: $574-$411
United Airlines
Thu 4/16Tue 4/21
ONT - KOA • 1 stop
Cheapest one-way
$193
Typical prices: $266-$325
Delta
Sun 5/31
ONT - KOA • 1 stop
Top airlines
Cheapest • from $386 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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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
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Insights
Top layover airports
Cheapest • Avg $457 (round-trip)
Shortest trip • 8h 25m (one-way)
Insights
Insights
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Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 46% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 25% 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 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

Thu, Apr 16 - Tue, Apr 21
United Airlines Logo
6:00 am - 10:47 am
ONT
-
KOA
7h 47m
1 stop
United Airlines Logo
10:48 pm - 12:20 pm
KOA
-
ONT
10h 32m
1 stop
$386United Airlines
Tue, May 5 - Thu, May 7
Delta Logo
11:53 am - 7:03 pm
ONT
-
KOA
10h 10m
1 stop
Delta Logo
8:50 pm - 11:12 am
KOA
-
ONT
11h 22m
1 stop
$390Delta
Sun, May 31 - Fri, Jun 5
Delta Logo
6:45 am - 5:37 pm
ONT
-
KOA
13h 52m
1 stop
Delta Logo
8:50 pm - 4:17 pm
KOA
-
ONT
16h 27m
2 stops
$392Delta
Mon, Apr 20 - Mon, Apr 27
Southwest Logo
7:00 am - 12:15 pm
ONT
-
KOA
8h 15m
1 stop
Southwest Logo
8:25 pm - 9:50 am
KOA
-
ONT
10h 25m
1 stop
$396Southwest
Tue, May 5 - Thu, May 7
Delta Logo
6:00 am - 7:03 pm
ONT
-
KOA
16h 03m
2 stops
Delta Logo
8:50 pm - 12:19 pm
KOA
-
ONT
12h 29m
2 stops
$401Delta
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 - 1:39 pm
KOA
-
ONT
13h 49m
1 stop
$402Delta
Wed, Sep 2 - Fri, Sep 11
Delta Logo
7:00 am - 5:51 pm
ONT
-
KOA
13h 51m
1 stop
Delta Logo
9:45 pm - 11:14 am
KOA
-
ONT
10h 29m
1 stop
$406Delta
Mon, Apr 20 - Mon, Apr 27
Delta Logo
6:00 am - 7:03 pm
ONT
-
KOA
16h 03m
2 stops
Delta Logo
8:50 pm - 4:25 pm
KOA
-
ONT
16h 35m
2 stops
$407Delta
Wed, Sep 2 - Sat, Sep 12
Delta Logo
7:00 am - 5:51 pm
ONT
-
KOA
13h 51m
1 stop
Delta Logo
9:45 pm - 4:14 pm
KOA
-
ONT
15h 29m
2 stops
$412Delta
Tue, May 5 - Thu, May 7
Delta Logo
6:00 am - 7:03 pm
ONT
-
KOA
16h 03m
2 stops
Delta Logo
9:55 pm - 12:19 pm
KOA
-
ONT
11h 24m
2 stops
$417Delta
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.

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

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 Kailua-Kona departing in April.

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 $369 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $704 and $579 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 46% 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$193
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 3% 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 $193 for a one-way ticket and $386 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, Southwest or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Kailua-Kona are Southwest and Alaska Airlines. With an average price for the route of $586 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $499 and an overall rating of 7.9.

  • 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
SouthwestOverall score based on 4332 reviews
7.0Food
8.1Boarding
7.5Entertainment
8.6Crew
8.0Comfort
Airline reviews

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

10.0 ExcellentMartie, Mar 2026
LGB - BNA
Read more Southwest reviews

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

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.

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

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

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

It was ok! Not fond of sitting in middle seat. Tried to upgrade with my Atmos card but it was a new account and they weren’t able to look up my account details.

Not bad. Due to not buying a seat, on the way back, my seat was not assigned till 2 hrs before the flight left. Got me worried I wouldn’t have a seat.

There is no entertainment on the plane. The snack is minimal. The crew was nice and professional.

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

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.

NEVER MADE THE FLIGHT BECAUSE DELTA SAID THEY CAN NOT

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.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

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.

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

My flight was canceled a few hours before boarding. I was rebooked on Copa airlines and missed an important meeting .

OK, we were delayed and had to de plane and reboard.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

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.

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

Information on your arrival and departure airports