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Kaua'i

$347+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$447
(Alaska Airlines)

One-way from

$347
(Delta)

Popular in

July

Cheapest in

January

Average price

$855
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 ($107 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
Wed 9/106:00 amSTL - LIH
2 stops14h 50mAlaska Airlines
Wed 9/1710:30 pmLIH - STL
1 stop11h 09mAlaska Airlines
Deal found 6/10$447
This American Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 9/16:45 amSTL - LIH
1 stop10h 27mAmerican Airlines
Thu 9/119:45 pmLIH - STL
2 stops13h 25mAmerican Airlines
Deal found 6/10$448
This Kiwi.com deal was found by Cheapflights users on 6/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/26:00 amSTL - LIH
1 stop12h 25mMultiple Airlines
Wed 9/1010:30 pmLIH - STL
1 stop11h 09mMultiple Airlines
Deal found 6/10$532
This United Airlines deal was found by Cheapflights users on 6/10. 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 9/39:00 amSTL - LIH
1 stop11h 36mUnited Airlines
Tue 9/97:40 pmLIH - STL
1 stop12h 03mUnited Airlines
Deal found 6/10$561
This Delta deal was found by Cheapflights users on 6/10. 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.
Sat 8/306:40 amSTL - LIH
2 stops15h 21mDelta
Mon 9/89:40 pmLIH - STL
2 stops15h 07mDelta
Deal found 6/10$575
This Kiwi.com deal was found by Cheapflights users on 6/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/43:57 pmSTL - LIH
1 stop34h 34mHawaiian Airlines
Wed 10/1510:31 pmLIH - STL
1 stop11h 24mHawaiian Airlines
Deal found 6/12$663
This Southwest deal was found by Cheapflights users on 6/10. 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.
Wed 8/206:45 amSTL - LIH
1 stop11h 05mSouthwest
Fri 8/298:40 pmLIH - STL
1 stop16h 10mSouthwest
Deal found 6/10$691

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 June 12, 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 9/10

6:00 am-3:50 pm

2 stops14h 50m

Lihue

Wed 9/17

10:30 pm-2:39 pm

1 stop11h 09m

$447

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 9/1

6:45 am-12:12 pm

1 stop10h 27m

Lihue

Thu 9/11

9:45 pm-4:10 pm

2 stops13h 25m

$448

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 9/2

6:00 am-1:25 pm

1 stop12h 25m

Lihue

Wed 9/10

10:30 pm-2:39 pm

1 stop11h 09m

$532

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 9/3

9:00 am-3:36 pm

1 stop11h 36m

Lihue

Tue 9/9

7:40 pm-12:43 pm

1 stop12h 03m

$561

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sat 8/30

6:00 am-5:01 pm

2 stops16h 01m

Lihue

Fri 9/12

9:26 pm-6:02 pm

2 stops15h 36m

$575

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sat 10/4

3:57 pm-9:31 pm

1 stop34h 34m

Lihue

Wed 10/15

10:31 pm-2:55 pm

1 stop11h 24m

$663

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 8/20

6:45 am-12:50 pm

1 stop11h 05m

Lihue

Fri 8/29

8:40 pm-5:50 pm

1 stop16h 10m

$691

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 7/28

7:45 am-6:00 pm

2 stops15h 15m

$347

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 7/29

3:24 pm-9:54 pm

1 stop11h 30m

$361

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 7/7

6:00 am-7:38 pm

1 stop18h 38m

$398

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/9

Showing 1-10 of 11 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, 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 June 12, 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.

Rainfall in Kaua'i by month

Plan your trip to Kaua'i by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Kaua'i ranges from 2.2 - 6.7 inches per month. January is typically the wettest month, when rainfall can reach 6.7 in. June is typically the driest time to visit Kaua'i when rainfall is around 2.2 in.

Temperature in Kaua'i by month

Plan your trip to Kaua'i by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Kaua'i, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 69.8 F).

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 June 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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 Delta. According to our data, you can fly for as low as $347. Users have also found prices from $361 and $398 on Alaska 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, 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$389Average$696FlexibilityNo cancel feeOn-time71%
DeltaCheapest$446Average$692FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$454Average$878FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$467Average$630FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$530Average$775FlexibilityNo cancel feeOn-time63%

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