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Ontario

$147+ Cheap flights from Kaua'i to Ontario (ONT)

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
LIH — ONT
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
1 adult, Economy
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Cheap flight deals from Kaua'i to Ontario

Cheapest flights from Kaua'i to Ontario
Explore the most affordable flight options available from Kaua'i to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/269:00 pm
LIH
-
ONT
1 stop23h 15m
Multiple Airlines
Mon 3/98:45 am
ONT
-
LIH
1 stop11h 17m
Multiple Airlines
Deal found 2/2$343
This Southwest deal was found by Cheapflights users on 2/2. 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.
Thu 2/2610:00 am
LIH
-
ONT
1 stop10h 20m
Southwest
Mon 3/911:10 am
ONT
-
LIH
2 stops9h 55m
Southwest
Deal found 2/2$413
This Southwest deal was found by Cheapflights users on 2/3. 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.
Wed 2/119:15 pm
LIH
-
ONT
1 stop10h 10m
Southwest
Tue 2/1710:15 am
ONT
-
LIH
1 stop8h 10m
Southwest
Deal found 2/3$456
This Southwest deal was found by Cheapflights users on 2/2. 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.
Tue 2/39:15 pm
LIH
-
ONT
1 stop10h 50m
Southwest
Tue 2/1010:00 am
ONT
-
LIH
1 stop8h 25m
Southwest
Deal found 2/2$476
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1911:19 pm
LIH
-
ONT
1 stop9h 49m
Alaska Airlines
Mon 2/236:08 pm
ONT
-
LIH
1 stop19h 19m
Alaska Airlines
Deal found 2/4$491
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:11 am
LIH
-
ONT
1 stop8h 56m
Multiple Airlines
Sat 6/271:47 pm
ONT
-
LIH
1 stop10h 41m
Multiple Airlines
Deal found 2/4$530
This Alaska Airlines deal was found by Cheapflights users on 2/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/412:02 pm
LIH
-
ONT
1 stop8h 54m
Alaska Airlines
Sat 6/271:47 pm
ONT
-
LIH
1 stop10h 41m
Alaska Airlines
Deal found 2/4$534

Find flight deals from Kaua'i to Ontario

Keep the following information in mind while searching for Kaua'i to Ontario flight deals. Data was last updated February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$343
(Kiwi.com)

One-way from

$147
(Kiwi.com)

Popular in

June

Cheapest in

December

Average price

$326
Provider with most accurate pricing for Lihue-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lihue-Los Angeles flights.
Search Deals
From Kaua'i to Ontario
Search Deals
One-way flight from Kaua'i to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Kaua'i to Ontario 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 February 4, 2026.
Use the filters below to find and compare flights from Kaua'i to Ontario that are best for you.

Fly from

Kaua'i

Fly to

Ontario

Route

Depart

Return

Price

LihueOntario

LIH - ONT

LIHONT

Lihue

Thu 2/26

9:00 pm-10:15 pm

1 stop23h 15m

Ontario

Mon 3/9

8:45 am-5:02 pm

1 stop11h 17m

$343

LihueOntario

LIH - ONT

LIHONT

Lihue

Thu 2/26

10:00 am-10:20 pm

1 stop10h 20m

Ontario

Mon 3/9

11:10 am-6:05 pm

2 stops9h 55m

$413

LihueOntario

LIH - ONT

LIHONT

Lihue

Sun 2/15

9:15 pm-9:25 am

1 stop10h 10m

Ontario

Wed 2/18

10:00 am-4:25 pm

1 stop8h 25m

$456

LihueOntario

LIH - ONT

LIHONT

Lihue

Thu 2/19

11:19 pm-11:08 am

1 stop9h 49m

Ontario

Mon 2/23

6:08 pm-11:27 am

1 stop19h 19m

$491

LihueOntario

LIH - ONT

LIHONT

Lihue

Wed 6/3

10:11 am-10:07 pm

1 stop8h 56m

Ontario

Sat 6/27

1:47 pm-9:28 pm

1 stop10h 41m

$530

LihueOntario

LIH - ONT

LIHONT

Lihue

Thu 6/4

12:02 pm-11:56 pm

1 stop8h 54m

Ontario

Sat 6/27

1:47 pm-9:28 pm

1 stop10h 41m

$534

LihueOntario

LIH - ONT

LIHONT

Lihue

Sat 2/14

11:59 pm-12:38 pm

1 stop10h 39m

Ontario

Fri 2/20

6:10 am-1:10 pm

1 stop9h 00m

$556

LihueOntario

LIH - ONT

LIHONT

Lihue

Fri 6/5

12:02 pm-11:56 pm

1 stop8h 54m

Ontario

Sat 6/27

1:47 pm-9:28 pm

1 stop10h 41m

$564

LihueOntario

LIH - ONT

LIHONT

Lihue

Thu 2/19

9:15 pm-11:10 am

2 stops11h 55m

Ontario

Mon 2/23

6:00 am-4:25 pm

1 stop12h 25m

$570

LihueOntario

LIH - ONT

LIHONT

Lihue

Thu 4/16

6:47 am-10:59 pm

1 stop13h 12m

$162

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 18 results
1
2

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

Have a flexible travel schedule? Discover the best time to fly to Ontario from Kaua'i 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 Kaua'i to Ontario

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

Currently, September is the cheapest month in which you can book a flight from Kaua'i to Ontario (average of $140). Flying from Kaua'i to Ontario in May is currently the most expensive (average of $284). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated February 4, 2026.
Read through reviews of airlines operating flights from Kaua'i to Ontario, such as Southwest. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,274 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,274 reviews
Southwest
8.0
Very good
4,274 reviews

Entertainment

7.5

Comfort

8.0

Boarding

8.1

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Kaua'i to Ontario. 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 into for flights to Ontario from Kaua'i?

    Most people fly into Ontario (ONT) if they book a flight to Ontario from Kaua'i. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

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

    For as low as $413, Southwest can have you in Ontario from Kaua'i in 10h 20m. Airlines will cover a distance of 2657 mi.

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

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $180. Southwest flights start at $191 while deals on United Airlines start at $218 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Kaua'i to Ontario 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 Kaua'i to Ontario?

    Currently, September is the cheapest month in which you can book a flight from Kaua'i to Ontario (average of $140). Flying from Kaua'i to Ontario in May is currently the most expensive (average of $284). 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

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Alternative routes for Kaua'i to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Kaua'i to Ontario

Discover the top airline that operate flights from Kaua'i to Ontario. 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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$321Average$595FlexibilityNo cancel feeOn-time63%

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