$475+ Cheap flights from St. Louis (STL) to Kaua'i
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Kaua'i with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Kaua'i
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Best
Last-minute
Cheapest flights from St. Louis to Kaua'iExplore 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 April 29, 2026.
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 April 29, 2026.
This Delta deal was found by Cheapflights users on 4/27. 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.
Mon 9/286:30 am
STL
- LIH
2 stops15h 42m
Delta
Mon 10/59:45 pm
LIH
- STL
2 stops18h 04m
Delta
Deal found 4/27![Delta logo]()
$475
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 5/275:33 pm
STL
- LIH
1 stop22h 29m
Alaska Airlines
Wed 6/312:02 pm
LIH
- STL
1 stop23h 35m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$500
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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 5/275:33 pm
STL
- LIH
2 stops25h 59m
Multiple Airlines
Wed 6/312:02 pm
LIH
- STL
1 stop23h 35m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$505
This United Airlines deal was found by Cheapflights users on 4/28. 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 10/59:00 am
STL
- LIH
1 stop11h 40m
United Airlines
Tue 10/207:35 pm
LIH
- STL
2 stops13h 43m
United Airlines
Deal found 4/28![United Airlines logo]()
$511
This American Airlines deal was found by Cheapflights users on 4/27. 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 10/66:30 am
STL
- LIH
1 stop10h 45m
American Airlines
Tue 10/201:45 pm
LIH
- STL
2 stops14h 42m
American Airlines
Deal found 4/27![American Airlines logo]()
$518
This American Airlines deal was found by Cheapflights users on 4/26. 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 9/156:30 am
STL
- LIH
1 stop10h 44m
American Airlines
Thu 9/2410:49 pm
LIH
- STL
1 stop20h 01m
American Airlines
Deal found 4/26![American Airlines logo]()
$522
This Delta deal was found by Cheapflights users on 4/25. 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 10/297:30 am
STL
- LIH
2 stops16h 52m
Delta
Mon 11/910:26 pm
LIH
- STL
2 stops15h 35m
Delta
Deal found 4/25![Delta logo]()
$530
This Expedia deal was found by Cheapflights users on 4/25. 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.
Thu 10/293:24 pm
STL
- LIH
1 stop11h 32m
Alaska Airlines
Mon 11/911:31 pm
LIH
- STL
1 stop10h 55m
Alaska Airlines
Deal found 4/25![Alaska Airlines logo]()
$534
This Delta deal was found by Cheapflights users on 4/27. 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.
Wed 9/307:30 am
STL
- LIH
2 stops16h 50m
Delta
Wed 10/79:45 pm
LIH
- STL
2 stops18h 04m
Delta
Deal found 4/27![Delta logo]()
$535
This Delta deal was found by Cheapflights users on 4/27. 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 9/276:59 pm
STL
- LIH
2 stops29h 21m
Delta
Mon 10/59:45 pm
LIH
- STL
2 stops18h 04m
Delta
Deal found 4/27![Delta logo]()
$537
This Kiwi.com deal was found by Cheapflights users on 4/25. 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.
Thu 10/297:00 am
STL
- LIH
2 stops14h 20m
Multiple Airlines
Mon 11/911:31 pm
LIH
- STL
1 stop10h 55m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$538
This Expedia deal was found by Cheapflights users on 4/27. 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 9/15:59 pm
STL
- LIH
2 stops26h 43m
Multiple Airlines
Tue 9/811:25 am
LIH
- STL
1 stop24h 38m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$540
Best flights from St. Louis to Kaua'iDiscover carefully curated flight deals from St. Louis to Kaua'i that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
Discover carefully curated flight deals from St. Louis to Kaua'i that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
This United Airlines deal was found by Cheapflights users on 4/27. 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 10/69:00 am
STL
- LIH
1 stop11h 40m
United Airlines
Tue 10/207:35 pm
LIH
- STL
1 stop12h 05m
United Airlines
Deal found 4/27![United Airlines logo]()
$554
This Delta deal was found by Cheapflights users on 4/24. 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.
Wed 5/276:21 am
STL
- LIH
2 stops16h 19m
Delta
Wed 6/39:55 pm
LIH
- STL
2 stops16h 08m
Delta
Deal found 4/24![Delta logo]()
$565
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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.
Sat 8/295:59 pm
STL
- LIH
2 stops26h 43m
Multiple Airlines
Sat 9/510:33 am
LIH
- STL
2 stops22h 31m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$630
This American Airlines deal was found by Cheapflights users on 4/28. 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 5/308:36 am
STL
- LIH
2 stops16h 45m
American Airlines
Sun 6/79:40 pm
LIH
- STL
1 stop11h 12m
American Airlines
Deal found 4/28![American Airlines logo]()
$630
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 9/276:00 am
STL
- LIH
1 stop13h 44m
Alaska Airlines
Tue 10/610:31 pm
LIH
- STL
1 stop10h 55m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$640
This Delta deal was found by Cheapflights users on 4/27. 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 10/16:30 am
STL
- LIH
2 stops17h 50m
Delta
Tue 10/69:45 pm
LIH
- STL
2 stops18h 04m
Delta
Deal found 4/27![Delta logo]()
$575
This United Airlines deal was found by Cheapflights users on 4/27. 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 9/19:00 am
STL
- LIH
1 stop11h 40m
United Airlines
Tue 9/87:35 pm
LIH
- STL
1 stop12h 05m
United Airlines
Deal found 4/27![United Airlines logo]()
$581
This Delta deal was found by Cheapflights users on 4/24. 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 5/296:21 am
STL
- LIH
2 stops16h 19m
Delta
Fri 6/59:55 pm
LIH
- STL
2 stops20h 26m
Delta
Deal found 4/24![Delta logo]()
$575
This United Airlines deal was found by Cheapflights users on 4/25. 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 5/118:46 am
STL
- LIH
1 stop12h 01m
United Airlines
Sat 5/1610:00 pm
LIH
- STL
2 stops13h 57m
United Airlines
Deal found 4/25![United Airlines logo]()
$638
This Delta deal was found by Cheapflights users on 4/27. 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.
Wed 7/87:55 pm
STL
- LIH
2 stops28h 08m
Delta
Tue 7/219:55 pm
LIH
- STL
2 stops20h 27m
Delta
Deal found 4/27![Delta logo]()
$637
Last-minute flights from St. Louis to Kaua'iDiscover last-minute flight deals from St. Louis to Kaua'i. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Kaua'i. Data last updated April 29, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/25. 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 5/48:00 am
STL
- LIH
1 stop12h 15m
American Airlines
Mon 5/119:30 pm
LIH
- STL
1 stop11h 21m
American Airlines
Deal found 4/25![American Airlines logo]()
$560
This Delta deal was found by Cheapflights users on 4/28. 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.
Mon 5/46:00 am
STL
- LIH
2 stops16h 40m
Delta
Mon 5/119:55 pm
LIH
- STL
2 stops16h 08m
Delta
Deal found 4/28![Delta logo]()
$571
This Delta deal was found by Cheapflights users on 4/25. 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.
Wed 5/206:21 am
STL
- LIH
2 stops17h 45m
Delta
Wed 5/278:40 pm
LIH
- STL
2 stops14h 35m
Delta
Deal found 4/25![Delta logo]()
$557
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 5/275:33 pm
STL
- LIH
1 stop22h 29m
Alaska Airlines
Wed 6/312:02 pm
LIH
- STL
1 stop23h 35m
Alaska Airlines
Deal found 4/27![Alaska Airlines logo]()
$500
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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 5/275:33 pm
STL
- LIH
2 stops25h 36m
Multiple Airlines
Wed 6/312:02 pm
LIH
- STL
1 stop23h 35m
Multiple Airlines
Deal found 4/27![Multiple Airlines logo]()
$505
This Delta deal was found by Cheapflights users on 4/24. 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 5/296:21 am
STL
- LIH
2 stops16h 19m
Delta
Fri 6/59:55 pm
LIH
- STL
2 stops20h 26m
Delta
Deal found 4/24![Delta logo]()
$575
Find 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 April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $500 (Alaska Airlines) |
Popular in | December |
Cheapest in | August |
Average price | $648 |
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 April 29, 2026.
Use the filters below to find and compare flights from St. Louis to Kaua'i that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Tue 10/6
9:00 am-3:40 pm
1 stop11h 40m
Lihue
Tue 10/20
7:35 pm-12:40 pm
1 stop12h 05m
$554
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Wed 5/27
6:21 am-5:40 pm
2 stops16h 19m
Lihue
Wed 6/3
9:55 pm-7:03 pm
2 stops16h 08m
$565
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Thu 10/1
6:30 am-7:20 pm
2 stops17h 50m
Lihue
Tue 10/6
9:45 pm-8:49 pm
2 stops18h 04m
$575
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Fri 5/29
6:21 am-5:40 pm
2 stops16h 19m
Lihue
Fri 6/5
9:55 pm-11:21 pm
2 stops20h 26m
$575
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Tue 9/1
9:00 am-3:40 pm
1 stop11h 40m
Lihue
Tue 9/8
7:35 pm-12:40 pm
1 stop12h 05m
$581
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Sat 8/29
5:59 pm-3:42 pm
2 stops26h 43m
Lihue
Sat 9/5
10:33 am-2:04 pm
2 stops22h 31m
$630
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Sat 5/30
8:36 am-8:21 pm
2 stops16h 45m
Lihue
Sun 6/7
9:40 pm-1:52 pm
1 stop11h 12m
$630
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Wed 7/8
7:55 pm-7:03 pm
2 stops28h 08m
Lihue
Tue 7/21
9:55 pm-11:22 pm
2 stops20h 27m
$637
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Mon 5/11
8:46 am-3:47 pm
1 stop12h 01m
Lihue
Sat 5/16
10:00 pm-4:57 pm
2 stops13h 57m
$638
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Sun 9/27
6:00 am-2:44 pm
1 stop13h 44m
Lihue
Tue 10/6
10:31 pm-2:26 pm
1 stop10h 55m
$640
Sorted by cheapest first
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.
STL-LIH
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
STL-zzFUS
STL-LIH
How far ahead should I book a flight from St. Louis to Kaua'i?
The best time to book flights from St. Louis to Kaua'i is 9 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 $308). Flying from St. Louis to Kaua'i in July is currently the most expensive (average of $747). 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 April 29, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, andUnited Airlines 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.
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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.
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Complete your trip
Complete your trip to Kaua'i by adding a car rental and/or hotel reservation to your travel itinerary.
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St. Louis and Kaua'i flights
Browse other St. Louis and Kaua'i flight options. Last updated on April 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from St. Louis to Kaua'i
Discover the top 4 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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$421 | Average$586 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$446 | Average$688 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$461 | Average$769 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$482 | Average$710 | FlexibilityNo cancel fee | On-time71% |