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Kaua'i

$238+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$360
(American Airlines)

One-way from

$238
(Alaska Airlines)

Popular in

December

Cheapest in

November

Average price

$597
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.
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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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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This American Airlines deal was found by Cheapflights users on 1/7. 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.
Wed 1/287:04 amSTL - LIH
1 stop13h 33mAmerican Airlines
Wed 2/410:10 pmLIH - STL
1 stop11h 43mAmerican Airlines
Deal found 1/7$360
This Travelocity deal was found by Cheapflights users on 1/8. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/92:47 pmSTL - LIH
2 stops27h 07mMultiple Airlines
Tue 3/1711:02 amLIH - STL
2 stops22h 49mMultiple Airlines
Deal found 1/8$403
This Expedia deal was found by Cheapflights users on 1/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:00 amSTL - LIH
1 stop19h 18mAlaska Airlines
Tue 3/1710:19 pmLIH - STL
1 stop11h 32mAlaska Airlines
Deal found 1/5$405
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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 3/37:00 amSTL - LIH
1 stop19h 18mMultiple Airlines
Wed 3/114:27 pmLIH - STL
2 stops16h 24mMultiple Airlines
Deal found 1/8$410
This Expedia deal was found by Cheapflights users on 1/5. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:00 amSTL - LIH
1 stop19h 18mMultiple Airlines
Tue 3/1711:02 amLIH - STL
2 stops22h 49mMultiple Airlines
Deal found 1/5$415
This American Airlines deal was found by Cheapflights users on 1/8. 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.
Wed 2/185:12 amSTL - LIH
2 stops16h 02mAmerican Airlines
Wed 2/2510:00 pmLIH - STL
1 stop21h 59mAmerican Airlines
Deal found 1/8$423
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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 3/37:00 amSTL - LIH
1 stop19h 18mMultiple Airlines
Thu 3/125:57 pmLIH - STL
2 stops14h 54mMultiple Airlines
Deal found 1/8$433
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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.
Sun 3/87:00 amSTL - LIH
1 stop19h 18mAlaska Airlines
Tue 3/1710:19 pmLIH - STL
1 stop11h 32mAlaska Airlines
Deal found 1/8$434

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 January 8, 2026.
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 2/17

5:00 am-1:15 pm

1 stop12h 15m

Lihue

Tue 2/24

9:15 pm-11:40 am

1 stop10h 25m

$360

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 1/28

7:04 am-4:37 pm

1 stop13h 33m

Lihue

Wed 2/4

11:00 pm-4:14 pm

2 stops13h 14m

$366

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 3/10

11:25 am-9:57 pm

2 stops15h 32m

Lihue

Tue 3/17

11:13 pm-8:56 pm

2 stops16h 43m

$371

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 3/3

7:00 am-10:18 pm

1 stop19h 18m

Lihue

Wed 3/11

4:27 pm-1:51 pm

2 stops16h 24m

$410

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 4/13

6:00 am-6:55 pm

2 stops17h 55m

Lihue

Mon 4/20

8:25 pm-2:38 pm

2 stops13h 13m

$434

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sat 2/21

11:25 am-10:44 pm

2 stops15h 19m

Lihue

Wed 2/25

2:25 pm-9:23 am

2 stops14h 58m

$437

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 3/1

3:19 pm-10:18 pm

1 stop34h 59m

Lihue

Wed 3/11

4:27 pm-1:51 pm

2 stops16h 24m

$451

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 3/5

7:00 am-10:22 pm

2 stops19h 22m

Lihue

Wed 3/11

4:27 pm-1:51 pm

2 stops16h 24m

$457

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 3/31

3:50 pm-8:57 am

2 stops22h 07m

Lihue

Tue 4/7

10:29 pm-2:51 pm

1 stop11h 22m

$467

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 3/11

7:00 am-9:18 pm

1 stop19h 18m

$238

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 17 results
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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 $328). Flying from St. Louis to Kaua'i in July is currently the most expensive (average of $703). 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.

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 January 8, 2026.
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
11,661 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
11,661 reviews
Alaska Airlines
8.0
Very good
11,661 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Southwest
8.0
Very good
4,250 reviews
Alaska Airlines
8.0
Very good
11,661 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,025 reviews
Alaska Airlines
8.0
Very good
11,661 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,139 reviews
Alaska Airlines
8.0
Very good
11,661 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.2
Good
11,095 reviews
Alaska Airlines
8.0
Very good
11,661 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Entertainment

7.0

Comfort

7.8

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 $360, Southwest can have you in Kaua'i from St. Louis in 12h 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 Southwest. According to our data, you can fly for as low as $201. Users have also found prices from $226 and $240 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, August is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $328). Flying from St. Louis to Kaua'i in July is currently the most expensive (average of $703). 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$308Average$588FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$416Average$745FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$440Average$799FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$451Average$583FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$477Average$792FlexibilityNo cancel feeOn-time63%

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