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Kaua'i

$231+ 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 10/30. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$461
(American Airlines)

One-way from

$231
(American Airlines)

Popular in

May

Cheapest in

January

Average price

$588
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. 13% potential increase in price ($108 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 17, 2025.

This American Airlines deal was found by Cheapflights users on 9/16. 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 11/510:39 pmLIH - STL
1 stop11h 01mAmerican Airlines
Deal found 9/16$461
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 11/157:00 amSTL - LIH
1 stop12h 59mAmerican Airlines
Sat 11/222:49 pmLIH - STL
2 stops14h 09mAmerican Airlines
Deal found 9/16$528
This Southwest deal was found by Cheapflights users on 9/15. 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.
Sat 12/135:30 amSTL - LIH
2 stops14h 25mSouthwest
Sun 12/219:10 pmLIH - STL
1 stop11h 10mSouthwest
Deal found 9/15$548
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/243:57 pmSTL - LIH
2 stops20h 06mAlaska Airlines
Wed 11/58:01 pmLIH - STL
2 stops23h 58mAlaska Airlines
Deal found 9/16$562
This Delta deal was found by Cheapflights users on 9/17. 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.
Fri 10/246:50 amSTL - LIH
2 stops17h 15mDelta
Wed 11/59:30 pmLIH - STL
2 stops16h 32mDelta
Deal found 9/17$564
This United Airlines deal was found by Cheapflights users on 9/16. 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 9/309:00 amSTL - LIH
1 stop11h 36mUnited Airlines
Fri 10/37:40 pmLIH - STL
2 stops15h 04mUnited Airlines
Deal found 9/16$566
This American Airlines deal was found by Cheapflights users on 9/16. 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 stops13h 24mAmerican Airlines
Deal found 9/16$567
This Delta deal was found by Cheapflights users on 9/16. 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 stops16h 20mDelta
Mon 10/69:40 pmLIH - STL
2 stops16h 00mDelta
Deal found 9/16$572

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 September 17, 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

Mon 2/2

2:55 pm-6:24 am

2 stops19h 29m

Lihue

Wed 2/11

10:10 pm-1:52 pm

1 stop11h 42m

$467

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 2/20

7:00 am-10:15 pm

1 stop19h 15m

Lihue

Sat 2/28

8:53 pm-11:56 pm

2 stops23h 03m

$497

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 2/1

2:55 pm-9:41 am

2 stops22h 46m

Lihue

Sun 2/8

2:50 pm-1:52 pm

2 stops19h 02m

$503

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 2/2

6:00 am-7:46 pm

1 stop17h 46m

Lihue

Wed 2/11

10:10 pm-1:34 pm

1 stop11h 24m

$519

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 10/24

6:39 am-12:15 pm

1 stop10h 36m

Lihue

Wed 11/5

10:39 pm-4:27 pm

2 stops13h 48m

$522

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 1/4

6:00 am-4:18 pm

2 stops14h 18m

Lihue

Fri 1/16

10:30 pm-4:14 pm

2 stops13h 44m

$527

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sat 11/15

7:00 am-3:59 pm

1 stop12h 59m

Lihue

Sat 11/22

2:49 pm-8:58 am

2 stops14h 09m

$528

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 1/14

2:55 pm-9:41 am

2 stops22h 46m

Lihue

Sun 1/18

10:10 pm-1:52 pm

1 stop11h 42m

$547

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 3/3

7:00 am-10:15 pm

1 stop19h 15m

Lihue

Wed 3/4

10:10 pm-1:52 pm

1 stop11h 42m

$551

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 10/30

6:39 am-12:15 pm

1 stop10h 36m

$231

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 20 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 September 17, 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 September 17, 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

Overall

8.0

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Comfort

7.8

Crew

8.5

Food

7.1

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 $519, Alaska Airlines can have you in Kaua'i from St. Louis in 17h 46m. St. Louis and Kaua'i are separated by a distance of 4171 mi. This flight may include one or multiple stops.

  • 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

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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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$308Average$588FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$389Average$701FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$446Average$799FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$451Average$596FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$530Average$787FlexibilityNo cancel feeOn-time63%

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