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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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$446
(Alaska Airlines)

One-way from

$221
(American Airlines)

Popular in

July

Cheapest in

January

Average price

$896
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 ($111 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/47:00 amSTL - LIH
2 stops17h 30mAlaska Airlines
Wed 11/1211:19 pmLIH - STL
1 stop11h 46mAlaska Airlines
Deal found 7/2$446
This American Airlines deal was found by Cheapflights users on 7/2. 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.
Tue 8/197:53 amSTL - LIH
1 stop11h 03mAmerican Airlines
Mon 8/259:16 pmLIH - STL
2 stops16h 14mAmerican Airlines
Deal found 7/2$447
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:00 amSTL - LIH
1 stop12h 15mSouthwest
Wed 11/129:10 pmLIH - STL
1 stop10h 00mSouthwest
Deal found 7/2$479
This Delta deal was found by Cheapflights users on 7/2. 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.
Tue 8/197:35 amSTL - LIH
2 stops16h 28mDelta
Tue 8/269:40 pmLIH - STL
2 stops15h 07mDelta
Deal found 7/2$505
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/711:25 amSTL - LIH
2 stops14h 00mUnited Airlines
Mon 7/147:40 pmLIH - STL
1 stop12h 06mUnited Airlines
Deal found 7/3$548

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 July 3, 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

Tue 8/19

7:53 am-1:56 pm

1 stop11h 03m

Lihue

Mon 8/25

9:16 pm-6:30 pm

2 stops16h 14m

$447

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 8/18

6:41 am-3:51 pm

2 stops14h 10m

Lihue

Wed 8/27

10:30 pm-2:39 pm

1 stop11h 09m

$458

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 8/19

7:35 am-7:03 pm

2 stops16h 28m

Lihue

Tue 8/26

9:40 pm-5:47 pm

2 stops15h 07m

$505

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 9/18

5:45 am-4:00 pm

2 stops15h 15m

Lihue

Tue 9/23

8:40 pm-3:55 pm

2 stops14h 15m

$523

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sat 8/16

7:55 am-7:38 pm

2 stops16h 43m

Lihue

Sun 8/24

11:10 pm-4:53 pm

1 stop12h 43m

$586

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 8/19

6:45 am-12:12 pm

1 stop10h 27m

$221

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 8/17

7:35 am-7:03 pm

2 stops16h 28m

$296

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 8/17

7:32 pm-9:54 pm

1 stop31h 22m

$324

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 7/7

6:00 am-7:38 pm

1 stop18h 38m

$405

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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 July 3, 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 July 3, 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

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,270 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,970 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,845 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $296 and $324 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

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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$389Average$695FlexibilityNo cancel feeOn-time71%
DeltaCheapest$446Average$692FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$454Average$878FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$467Average$625FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$530Average$783FlexibilityNo cancel feeOn-time63%

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