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Kaua'i

$189+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Dec 20 — Dec 271
Sat 12/20
Sat 12/27
1 adult, Economy
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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 November 20, 2025.

This Delta deal was found by Cheapflights users on 11/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:15 amSTL - LIH
2 stops17h 55mDelta
Mon 12/89:50 pmLIH - STL
2 stops17h 20mDelta
Deal found 11/17$473
This United Airlines deal was found by Cheapflights users on 11/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/39:00 amSTL - LIH
1 stop11h 58mUnited Airlines
Mon 12/88:30 pmLIH - STL
1 stop12h 09mUnited Airlines
Deal found 11/17$531
This American Airlines deal was found by Cheapflights users on 11/19. 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.
Thu 12/47:38 amSTL - LIH
1 stop12h 10mAmerican Airlines
Mon 12/810:44 pmLIH - STL
1 stop11h 07mAmerican Airlines
Deal found 11/19$581
This Delta deal was found by Cheapflights users on 11/18. 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 12/36:15 amSTL - LIH
2 stops17h 55mDelta
Sun 12/710:55 pmLIH - STL
2 stops13h 54mDelta
Deal found 11/18$592
This United Airlines deal was found by Cheapflights users on 11/19. 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.
Wed 12/179:00 amSTL - LIH
1 stop11h 58mUnited Airlines
Wed 12/249:35 pmLIH - STL
2 stops14h 52mUnited Airlines
Deal found 11/19$597
This United Airlines deal was found by Cheapflights users on 11/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/39:00 amSTL - LIH
1 stop11h 58mUnited Airlines
Sun 12/78:30 pmLIH - STL
1 stop12h 09mUnited Airlines
Deal found 11/18$611
This American Airlines deal was found by Cheapflights users on 11/19. 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 12/147:38 amSTL - LIH
1 stop12h 10mAmerican Airlines
Sun 12/213:55 pmLIH - STL
2 stops13h 01mAmerican Airlines
Deal found 11/19$638

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 November 20, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$382
(American Airlines)

One-way from

$189
(Southwest)

Popular in

May

Cheapest in

November

Average price

$552
Provider with most accurate pricing for Lambert-St Louis-Lihue flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Lihue flights.
Search Deals
From Lambert-St Louis to Kaua'i
Search Deals
One-way flight from Lambert-St Louis to Kaua'i
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($91 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 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

Wed 1/14

6:00 am-1:15 pm

1 stop11h 15m

Lihue

Wed 1/14

7:05 pm-11:45 am

2 stops12h 40m

$382

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 1/14

6:00 am-6:21 pm

2 stops16h 21m

Lihue

Wed 1/14

10:45 pm-9:35 pm

2 stops18h 50m

$414

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 4/21

7:10 am-4:10 pm

2 stops14h 00m

Lihue

Tue 4/28

8:10 pm-12:00 pm

1 stop10h 50m

$433

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 2/2

2:50 pm-10:41 pm

1 stop11h 51m

Lihue

Tue 2/3

10:20 pm-1:54 pm

1 stop11h 34m

$451

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 2/2

6:00 am-6:31 pm

2 stops16h 31m

Lihue

Tue 2/3

10:45 pm-8:37 pm

2 stops17h 52m

$452

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 2/20

6:00 am-6:31 pm

2 stops16h 31m

Lihue

Thu 2/26

10:45 pm-8:45 pm

2 stops18h 00m

$454

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 2/2

2:50 pm-10:41 pm

1 stop11h 51m

Lihue

Tue 2/3

5:25 pm-1:54 pm

2 stops16h 29m

$456

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 12/3

6:15 am-8:10 pm

2 stops17h 55m

Lihue

Mon 12/8

9:50 pm-7:10 pm

2 stops17h 20m

$473

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 3/11

7:30 am-7:31 pm

2 stops17h 01m

$197

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 1/14

6:00 am-4:37 pm

2 stops14h 37m

$231

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Showing 1-10 of 16 results
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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, August is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $321). Flying from St. Louis to Kaua'i in May is currently the most expensive (average of $644). 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 November 20, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Kaua'i in the evening. If you’re flexible enough to do this you can expect to save up to 53% on your trip compared to booking a flight in the afternoon.

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 November 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
11,320 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
Alaska Airlines
8.0
Very good
11,320 reviews
Alaska Airlines
8.0
Very good
11,320 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
Southwest
8.0
Very good
4,249 reviews
Alaska Airlines
8.0
Very good
11,320 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
Delta
7.9
Good
8,004 reviews
Alaska Airlines
8.0
Very good
11,320 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
United Airlines
7.4
Good
9,023 reviews
Alaska Airlines
8.0
Very good
11,320 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.
American Airlines
7.2
Good
11,046 reviews
Alaska Airlines
8.0
Very good
11,320 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Marcie,Nov 2025

PIT - SEA

It was not a full flight, so I was able to enjoy a row to myself. Luck of the draw, I guess.

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 $382, Southwest can have you in Kaua'i from St. Louis in 11h 15m. 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 Delta. According to our data, you can fly for as low as $197. Users have also found prices from $231 and $302 on American Airlines 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, August is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $321). Flying from St. Louis to Kaua'i in May is currently the most expensive (average of $644). 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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See prices for flight routes from nearby airports that may be better suited for you.
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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 November 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$308Average$588FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$389Average$709FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$446Average$803FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$451Average$583FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$477Average$800FlexibilityNo cancel feeOn-time63%

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