Kaua'i

$300+ Cheap flights from St. Louis (STL) 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Jun 12 — Jun 191
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Cheap flight deals from St. Louis to Kaua'i

Cheapest flights from St. Louis to Kaua'i
Explore the most affordable flight options available from St. Louis to Kaua'i. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 13, 2026.

This Delta deal was found by Cheapflights users on 5/8. 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.
Mon 9/217:30 am
STL
-
LIH
2 stops16h 50m
Delta
Mon 9/289:45 pm
LIH
-
STL
2 stops15h 15m
Delta
Deal found 5/8$475
This American Airlines deal was found by Cheapflights users on 5/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:30 am
STL
-
LIH
1 stop10h 44m
American Airlines
Tue 9/221:44 pm
LIH
-
STL
2 stops14h 43m
American Airlines
Deal found 5/12$500
This Delta deal was found by Cheapflights users on 5/8. 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 9/158:50 am
STL
-
LIH
2 stops13h 22m
Delta
Tue 9/229:45 pm
LIH
-
STL
2 stops15h 15m
Delta
Deal found 5/8$505
This Alaska Airlines deal was found by Cheapflights users on 5/9. 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.
Tue 9/296:00 am
STL
-
LIH
1 stop13h 44m
Alaska Airlines
Wed 9/309:35 pm
LIH
-
STL
1 stop11h 46m
Alaska Airlines
Deal found 5/9$534
This Southwest deal was found by Cheapflights users on 5/9. 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 10/65:30 am
STL
-
LIH
2 stops15h 40m
Southwest
Tue 10/208:30 pm
LIH
-
STL
1 stop12h 50m
Southwest
Deal found 5/9$540
This Alaska Airlines deal was found by Cheapflights users on 5/12. 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.
Tue 9/156:00 am
STL
-
LIH
2 stops15h 30m
Multiple Airlines
Tue 9/224:52 pm
LIH
-
STL
2 stops19h 11m
Multiple Airlines
Deal found 5/12$545
This United Airlines deal was found by Cheapflights users on 5/8. 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.
Mon 9/219:00 am
STL
-
LIH
1 stop11h 40m
United Airlines
Mon 9/287:35 pm
LIH
-
STL
1 stop12h 05m
United Airlines
Deal found 5/8$547
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Mon 9/287:34 pm
STL
-
LIH
1 stop24h 10m
Multiple Airlines
Fri 10/28:45 pm
LIH
-
STL
2 stops13h 59m
Multiple Airlines
Deal found 5/11$555

Find flight deals from St. Louis to Kaua'i

Keep the following information in mind while searching for St. Louis to Kaua'i flight deals. Data was last updated May 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$558
(Alaska Airlines)

One-way from

$300
(United Airlines)

Popular in

July

Cheapest in

August

Average price

$685
Provider with most accurate pricing for Lambert-St Louis-Lihue flight deals.
Provider most trusted by Cheapflights users for Lambert-St Louis-Lihue flights.
From Lambert-St Louis to Kaua'i
One-way flight from Lambert-St Louis to Kaua'i
Highest demand for flights based on searches. 11% potential increase in price ($89 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Average for round-trip flights in May 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis 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 May 13, 2026.
Use the filters below to find and compare flights from St. Louis to Kaua'i that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 7/23

6:21 am-7:03 pm

2 stops17h 42m

Lihue

Tue 7/28

9:55 pm-10:15 pm

2 stops19h 20m

$580

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 5/27

6:21 am-7:06 pm

2 stops17h 45m

Lihue

Sat 6/6

9:49 pm-11:23 pm

2 stops20h 34m

$592
Quickest round-trip

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 7/9

6:21 am-7:03 pm

2 stops17h 42m

Lihue

Tue 7/14

8:31 pm-4:46 pm

2 stops15h 15m

$620

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 7/7

6:21 am-7:03 pm

2 stops17h 42m

Lihue

Tue 7/14

8:31 pm-4:46 pm

2 stops15h 15m

$654

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 6/3

7:00 am-7:04 pm

2 stops17h 04m

Lihue

Tue 6/9

9:55 pm-7:03 pm

2 stops16h 08m

$680

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 7/1

6:21 am-7:02 pm

2 stops17h 41m

Lihue

Wed 7/8

9:55 pm-7:00 pm

2 stops16h 05m

$684

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 5/27

5:33 pm-11:02 am

1 stop22h 29m

Lihue

Sat 6/6

12:30 pm-8:50 am

2 stops15h 20m

$687

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 7/1

6:21 am-7:02 pm

2 stops17h 41m

Lihue

Fri 7/31

9:55 pm-9:00 pm

2 stops18h 05m

$700
Cheapest one-way
Quickest one-way

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 5/19

8:46 am-3:47 pm

1 stop12h 01m

$300

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 5/19

6:21 am-7:06 pm

2 stops17h 45m

$368

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Best time to book a flight from St. Louis to Kaua'i

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

How far ahead should I book a flight from St. Louis to Kaua'i?

The best time to book flights from St. Louis to Kaua'i is 9 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Kaua'i?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $308). Flying from St. Louis to Kaua'i in July is currently the most expensive (average of $747). 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis 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 St. Louis to Kaua'i?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly out of when you book flights from St. Louis to Kaua'i.

  • How long is the flight from St. Louis to Kaua'i?

    For as low as $580, Delta can have you in Kaua'i from St. Louis in 17h 42m. St. Louis and Kaua'i are separated by a distance of 4171 mi.

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

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

  • How can I find direct flights from St. Louis to Kaua'i?

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

  • Can I find deals for business class flights from St. Louis to Kaua'i?

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

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $308). Flying from St. Louis to Kaua'i in July is currently the most expensive (average of $747). 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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Top 4 airlines flying from St. Louis to Kaua'i

Discover the top 4 airlines that operate flights from St. Louis 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 May 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$410Average$563FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$446Average$679FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$461Average$769FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$492Average$742FlexibilityNo cancel feeOn-time71%

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