HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kaua'i

$162+ Cheap flights from Ontario (ONT) to Kaua'i

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIH
Apr 8 — Apr 151
Wed 4/8
Wed 4/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Kaua'i with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Kaua'i

Cheapest flights from Ontario to Kaua'i
Explore the most affordable flight options available from Ontario to Kaua'i. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 9, 2026.

This Delta deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
ONT
-
LIH
1 stop13h 40m
Delta
Fri 5/89:40 pm
LIH
-
ONT
1 stop11h 55m
Delta
Deal found 3/6$332
This Southwest deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/266:00 am
ONT
-
LIH
1 stop13h 10m
Southwest
Tue 5/59:10 pm
LIH
-
ONT
1 stop11h 55m
Southwest
Deal found 3/4$342
This Delta deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
ONT
-
LIH
1 stop13h 40m
Delta
Mon 5/48:20 pm
LIH
-
ONT
1 stop14h 19m
Delta
Deal found 3/6$344
This United Airlines deal was found by Cheapflights users on 3/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:27 pm
ONT
-
LIH
1 stop9h 26m
United Airlines
Thu 4/2311:00 pm
LIH
-
ONT
1 stop7h 56m
United Airlines
Deal found 3/4$354
This Delta deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
ONT
-
LIH
1 stop13h 40m
Delta
Tue 5/58:20 pm
LIH
-
ONT
2 stops12h 54m
Delta
Deal found 3/6$364
This Delta deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:55 pm
ONT
-
LIH
1 stop26h 45m
Delta
Fri 5/89:40 pm
LIH
-
ONT
1 stop10h 32m
Delta
Deal found 3/6$368
This Delta deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:55 pm
ONT
-
LIH
1 stop26h 45m
Delta
Wed 5/68:20 pm
LIH
-
ONT
2 stops12h 59m
Delta
Deal found 3/6$374
This Delta deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:00 am
ONT
-
LIH
1 stop13h 40m
Delta
Wed 5/68:20 pm
LIH
-
ONT
1 stop11h 52m
Delta
Deal found 3/6$378
This Southwest deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/196:00 am
ONT
-
LIH
1 stop13h 10m
Southwest
Sat 4/259:10 pm
LIH
-
ONT
1 stop12h 05m
Southwest
Deal found 3/5$379
This Delta deal was found by Cheapflights users on 3/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:20 pm
ONT
-
LIH
1 stop30h 20m
Delta
Mon 5/48:20 pm
LIH
-
ONT
1 stop14h 19m
Delta
Deal found 3/6$380

Find flight deals from Ontario to Kaua'i

Keep the following information in mind while searching for Ontario to Kaua'i flight deals. Data was last updated March 9, 2026.

Round-trip from

$332
(Delta)

One-way from

$162
(Alaska Airlines)

Popular in

December

Cheapest in

September

Average price

$663
From Ontario to Kaua'i
Search Deals
One-way flight from Ontario to Kaua'i
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($74 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($55 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Kaua'i that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 9, 2026.
Use the filters below to find and compare flights from Ontario to Kaua'i that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Wed 4/29

2:20 pm-5:40 pm

1 stop30h 20m

Lihue

Tue 5/5

8:20 pm-1:39 pm

1 stop14h 19m

$368

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Thu 4/30

7:00 am-5:40 pm

1 stop13h 40m

Lihue

Fri 5/8

9:40 pm-12:35 pm

1 stop11h 55m

$378

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Wed 4/29

7:00 am-5:40 pm

1 stop13h 40m

Lihue

Mon 5/4

8:20 pm-11:44 pm

2 stops24h 24m

$389

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Fri 5/1

2:20 pm-5:40 pm

1 stop30h 20m

Lihue

Wed 5/6

8:20 pm-11:12 am

1 stop11h 52m

$398
Quickest round-trip

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Sun 5/10

8:30 am-1:24 pm

1 stop7h 54m

Lihue

Thu 5/21

12:06 pm-10:17 pm

1 stop7h 11m

$413

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Thu 4/16

6:00 am-11:23 am

1 stop8h 23m

Lihue

Sun 4/19

11:00 pm-12:20 pm

1 stop10h 20m

$456

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Tue 3/17

6:15 am-4:30 pm

2 stops13h 15m

Lihue

Tue 3/24

9:10 pm-7:55 am

1 stop7h 45m

$466

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Sun 4/26

8:30 am-1:24 pm

1 stop7h 54m

Lihue

Sun 5/3

9:00 pm-9:10 pm

1 stop21h 10m

$479

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Fri 4/17

1:27 pm-7:53 pm

1 stop9h 26m

Lihue

Mon 4/20

11:00 pm-9:56 am

1 stop7h 56m

$522

OntarioLihue

ONT - LIH

ONTLIH

Ontario

Thu 4/16

1:27 pm-7:53 pm

1 stop9h 26m

Lihue

Mon 4/20

11:00 pm-12:20 pm

1 stop10h 20m

$522

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Ontario to Kaua'i

Have a flexible travel schedule? Discover the best time to fly to Kaua'i from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Kaua'i

What is the cheapest month to book a flight from Ontario to Kaua'i?

Currently, July is the cheapest month in which you can book a flight from Ontario to Kaua'i (average of $187). Flying from Ontario to Kaua'i in December is currently the most expensive (average of $493). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Kaua'i

Get insights into the airlines that provide service to Kaua'i. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Kaua'i. Reviews last updated March 9, 2026.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Ontario to Kaua'i by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
12,001 reviews

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
12,001 reviews
Alaska Airlines
8.0
Very good
12,001 reviews

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,314 reviews
Alaska Airlines
8.0
Very good
12,001 reviews

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,271 reviews
Alaska Airlines
8.0
Very good
12,001 reviews

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,408 reviews
Alaska Airlines
8.0
Very good
12,001 reviews

Entertainment

7.0

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

Related info for your journey

Find useful and relevant information for your journey from Ontario to Kaua'i. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Kaua'i?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Kaua'i. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Kaua'i?

    Delta can get you from Ontario to Kaua'i in just under 30h 20m. Your travel time can differ by up to . There are 2657 mi between Ontario and Kaua'i.

  • What are the cheapest airlines to fly from Ontario to Kaua'i one-way?

    $175 is the cheapest one-way deal found within the past few days, from Southwest. You may also be able to find cheap deals on United Airlines and Alaska Airlines, with prices starting from $186 and $213, respectively.

  • Can I find deals for flights from Ontario to Kaua'i that include hotel bookings?

    Yes. In addition to deals on Ontario to Kaua'i flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Kaua'i?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Kaua'i.

  • Can I find deals for business class flights from Ontario to Kaua'i?

    Yes. Cheapflights offers flight deals from Ontario to Kaua'i by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Kaua'i?

    Currently, July is the cheapest month in which you can book a flight from Ontario to Kaua'i (average of $187). Flying from Ontario to Kaua'i in December is currently the most expensive (average of $493). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 4 airlines flying from Ontario to Kaua'i

Discover the top 4 airlines that operate flights from Ontario to Kaua'i. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$216Average$352FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$361Average$590FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$377Average$598FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$393Average$596FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.