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Kaua'i

$221+ 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 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheap 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 August 20, 2025.

Round-trip from

$441
(American Airlines)

One-way from

$221
(American Airlines)

Popular in

May

Cheapest in

January

Average price

$618
From Lambert-St Louis to Kaua'i
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One-way flight from Lambert-St Louis to Kaua'i
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Highest demand for flights based on searches. 12% potential increase in price ($102 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 20, 2025.

This American Airlines deal was found by Cheapflights users on 8/18. 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 12/96:25 amSTL - LIH
1 stop11h 08mAmerican Airlines
Mon 12/1510:14 pmLIH - STL
1 stop11h 19mAmerican Airlines
Deal found 8/18$441
This American Airlines deal was found by Cheapflights users on 8/19. 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.
Sun 9/286:20 amSTL - LIH
1 stop10h 54mAmerican Airlines
Mon 10/61:45 pmLIH - STL
2 stops14h 06mAmerican Airlines
Deal found 8/19$447
This Delta deal was found by Cheapflights users on 8/18. 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.
Sun 9/286:01 amSTL - LIH
2 stops17h 58mDelta
Mon 10/68:30 pmLIH - STL
2 stops13h 02mDelta
Deal found 8/18$452
This Alaska Airlines deal was found by Cheapflights users on 8/19. 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 9/166:00 amSTL - LIH
2 stops14h 50mAlaska Airlines
Tue 9/309:00 pmLIH - STL
2 stops15h 34mAlaska Airlines
Deal found 8/19$476
This Delta deal was found by Cheapflights users on 8/18. 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 9/107:35 amSTL - LIH
2 stops16h 28mDelta
Wed 9/179:40 pmLIH - STL
2 stops15h 22mDelta
Deal found 8/18$483
This American Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 10/247:31 amSTL - LIH
1 stop11h 59mAmerican Airlines
Wed 11/510:44 pmLIH - STL
1 stop10h 56mAmerican Airlines
Deal found 8/18$511
This Delta deal was found by Cheapflights users on 8/18. 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.
Fri 10/246:00 amSTL - LIH
2 stops18h 05mDelta
Wed 11/59:30 pmLIH - STL
2 stops14h 01mDelta
Deal found 8/18$513
This United Airlines deal was found by Cheapflights users on 8/19. 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.
Tue 9/169:00 amSTL - LIH
1 stop11h 36mUnited Airlines
Tue 9/307:40 pmLIH - STL
1 stop12h 04mUnited Airlines
Deal found 8/19$535
This Alaska Airlines deal was found by Cheapflights users on 8/17. 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.
Sat 11/17:00 amSTL - LIH
2 stops35h 33mAlaska Airlines
Sat 11/89:00 pmLIH - STL
2 stops14h 18mAlaska Airlines
Deal found 8/17$539
This Southwest deal was found by Cheapflights users on 8/19. 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 9/185:45 amSTL - LIH
2 stops15h 15mSouthwest
Thu 9/258:40 pmLIH - STL
1 stop10h 15mSouthwest
Deal found 8/19$540
This Alaska Airlines deal was found by Cheapflights users on 8/19. 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 9/186:30 pmSTL - LIH
2 stops20h 17mAlaska Airlines
Thu 9/256:59 pmLIH - STL
2 stops17h 35mAlaska Airlines
Deal found 8/19$554

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 August 20, 2025.
Use the filters below to find and compare flights from St. Louis to Kaua'i that are best for you.

Fly from

St. Louis

Fly to

Kaua'i

Route

Depart

Return

Price

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 9/28

6:20 am-12:14 pm

1 stop10h 54m

Lihue

Mon 10/6

1:45 pm-8:09 am

2 stops13h 24m

$447

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 9/28

6:01 am-6:59 pm

2 stops17h 58m

Lihue

Mon 10/6

8:30 pm-2:32 pm

2 stops13h 02m

$452

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 9/10

7:35 am-7:03 pm

2 stops16h 28m

Lihue

Wed 9/17

9:40 pm-6:02 pm

2 stops15h 22m

$452

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 9/16

6:00 am-3:50 pm

2 stops14h 50m

Lihue

Tue 9/30

9:00 pm-5:34 pm

2 stops15h 34m

$476

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 9/28

6:20 am-12:14 pm

1 stop10h 54m

$221

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sat 9/27

7:40 am-6:59 pm

2 stops16h 19m

$226

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 1/22

2:55 pm-6:24 am

2 stops19h 29m

$226

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 1/13

7:30 am-8:31 pm

2 stops17h 01m

$226

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 9/28

6:01 am-6:59 pm

2 stops17h 58m

$226

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 1/13

2:55 pm-12:45 pm

1 stop25h 50m

$239

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 14 results
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

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

Currently, January is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $440). Flying from St. Louis to Kaua'i in June is currently the most expensive (average of $689). 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.

What is the cheapest time of day to fly from STL to FUS?

Find hourly flight availability from St. Louis to Kaua'i. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Kaua'i as you normally would.

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 August 20, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from St. Louis to Kaua'i have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
Delta
8.0
Very good
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
United Airlines
7.4
Good
8,928 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

PDX - SJC

They had no snacks and had to pay for the Wifi.

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 $447, American Airlines can have you in Kaua'i from St. Louis in 10h 54m. St. Louis and Kaua'i are separated by a distance of 4171 mi. This flight may include one or multiple stops.

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

    For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $221. Users have also found prices from $226 and $226 on Delta and Alaska Airlines, respectively.

  • 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, January is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $440). Flying from St. Louis to Kaua'i in June is currently the most expensive (average of $689). 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

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Top 5 airlines flying from St. Louis to Kaua'i

Discover the top 5 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$389Average$695FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$446Average$807FlexibilityNo cancel feeOn-time69%
DeltaCheapest$446Average$652FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$451Average$616FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$530Average$769FlexibilityNo cancel feeOn-time63%

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