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Kaua'i

$228+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
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 4, 2025.

This Delta deal was found by Cheapflights users on 11/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:00 amSTL - LIH
2 stops16h 16mDelta
Thu 12/49:50 pmLIH - STL
2 stops17h 20mDelta
Deal found 11/2$513
This American Airlines deal was found by Cheapflights users on 11/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:00 amSTL - LIH
1 stop12h 59mAmerican Airlines
Thu 12/410:44 pmLIH - STL
1 stop11h 07mAmerican Airlines
Deal found 11/2$531
This Delta deal was found by Cheapflights users on 11/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:00 amSTL - LIH
2 stops16h 33mDelta
Sun 12/212:15 pmLIH - STL
2 stops19h 08mDelta
Deal found 11/2$572
This American Airlines deal was found by Cheapflights users on 11/2. 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 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 12/219:45 pmLIH - STL
1 stop12h 11mAmerican Airlines
Deal found 11/2$597
This Alaska Airlines deal was found by Cheapflights users on 11/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/244:15 pmSTL - LIH
1 stop34h 17mAlaska Airlines
Mon 12/111:32 pmLIH - STL
1 stop34h 55mAlaska Airlines
Deal found 11/3$651

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 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$442
(Expedia)

One-way from

$228
(Expedia)

Popular in

May

Cheapest in

January

Average price

$552
Provider with most accurate pricing for Lambert-St Louis-Lihue flight deals.
Search Deals
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. 13% potential increase in price ($114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 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 4, 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

Fri 1/30

7:52 am-3:55 pm

1 stop12h 03m

Lihue

Fri 2/6

10:10 pm-1:53 pm

1 stop11h 43m

$481

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 1/30

2:50 pm-10:41 pm

1 stop11h 51m

Lihue

Fri 2/6

6:00 am-10:46 pm

2 stops12h 46m

$486

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 1/30

7:00 am-6:31 pm

2 stops15h 31m

Lihue

Fri 2/6

9:31 pm-2:48 pm

2 stops13h 17m

$492

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 1/4

6:00 am-6:39 pm

2 stops16h 39m

Lihue

Fri 1/16

11:00 pm-4:14 pm

2 stops13h 14m

$492

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 11/13

7:00 am-3:59 pm

1 stop12h 59m

Lihue

Thu 12/4

10:44 pm-1:51 pm

1 stop11h 07m

$531

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 12/14

6:00 am-6:33 pm

2 stops16h 33m

Lihue

Sun 12/21

2:15 pm-1:23 pm

2 stops19h 08m

$572

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 1/5

7:00 am-7:55 pm

2 stops16h 55m

Lihue

Sat 1/10

9:31 pm-9:35 pm

2 stops20h 04m

$579

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 3/10

2:55 pm-9:43 am

2 stops23h 48m

$228

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 2/11

7:04 am-4:37 pm

1 stop13h 33m

$241

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 3/10

8:30 am-4:04 pm

1 stop12h 34m

$272

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 19 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, August is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $334). Flying from St. Louis to Kaua'i in May is currently the most expensive (average of $629). 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 4, 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 4, 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
11,241 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Alaska Airlines
8.0
Very good
11,241 reviews
Alaska Airlines
8.0
Very good
11,241 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Southwest
8.0
Very good
4,239 reviews
Alaska Airlines
8.0
Very good
11,241 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
Delta
7.9
Good
8,003 reviews
Alaska Airlines
8.0
Very good
11,241 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
United Airlines
7.4
Good
9,002 reviews
Alaska Airlines
8.0
Very good
11,241 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.
American Airlines
7.2
Good
11,040 reviews
Alaska Airlines
8.0
Very good
11,241 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

BOS - HNL

The flight was awesome but a little long. I would prefer a flight with a layover. The amount of space available was minimal and a little uncomfortable for that long of a flight.

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 $486, American Airlines can have you in Kaua'i from St. Louis in 11h 51m. 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 Alaska Airlines. According to our data, you can fly for as low as $228. Users have also found prices from $241 and $272 on American Airlines and United 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 $334). Flying from St. Louis to Kaua'i in May is currently the most expensive (average of $629). 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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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 4, 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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