$300+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LIH
Jun 12 — Jun 191
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
One-way
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 May 13, 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 May 13, 2026.
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:30 am
STL
- LIH
2 stops16h 50m
Delta
Mon 9/289:45 pm
LIH
- STL
2 stops15h 15m
Delta
Deal found 5/8![Delta logo]()
$475
This American Airlines deal was found by Cheapflights users on 5/12. 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 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
Tue 9/221:44 pm
LIH
- STL
2 stops14h 43m
American Airlines
Deal found 5/12![American Airlines logo]()
$500
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:50 am
STL
- LIH
2 stops13h 22m
Delta
Tue 9/229:45 pm
LIH
- STL
2 stops15h 15m
Delta
Deal found 5/8![Delta logo]()
$505
This Alaska Airlines deal was found by Cheapflights users on 5/9. 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 9/296:00 am
STL
- LIH
1 stop13h 44m
Alaska Airlines
Wed 9/309:35 pm
LIH
- STL
1 stop11h 46m
Alaska Airlines
Deal found 5/9![Alaska Airlines logo]()
$534
This Southwest deal was found by Cheapflights users on 5/9. 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 10/65:30 am
STL
- LIH
2 stops15h 40m
Southwest
Tue 10/208:30 pm
LIH
- STL
1 stop12h 50m
Southwest
Deal found 5/9![Southwest logo]()
$540
This Alaska Airlines deal was found by Cheapflights users on 5/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:00 am
STL
- LIH
2 stops15h 30m
Multiple Airlines
Tue 9/224:52 pm
LIH
- STL
2 stops19h 11m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$545
This United Airlines deal was found by Cheapflights users on 5/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/219:00 am
STL
- LIH
1 stop11h 40m
United Airlines
Mon 9/287:35 pm
LIH
- STL
1 stop12h 05m
United Airlines
Deal found 5/8![United Airlines logo]()
$547
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Mon 9/287:34 pm
STL
- LIH
1 stop24h 10m
Multiple Airlines
Fri 10/28:45 pm
LIH
- STL
2 stops13h 59m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$555
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 May 13, 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 May 13, 2026.
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:21 am
STL
- LIH
2 stops17h 42m
Delta
Tue 7/289:55 pm
LIH
- STL
2 stops19h 20m
Delta
Deal found 5/8![Delta logo]()
$580
This Alaska Airlines deal was found by Cheapflights users on 5/9. 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
Sat 6/612:30 pm
LIH
- STL
2 stops15h 20m
Alaska Airlines
Deal found 5/9![Alaska Airlines logo]()
$687
This Delta deal was found by Cheapflights users on 5/10. 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.
Wed 5/276:21 am
STL
- LIH
2 stops17h 45m
Delta
Sat 6/69:49 pm
LIH
- STL
2 stops20h 34m
Delta
Deal found 5/10![Delta logo]()
$592
This Delta deal was found by Cheapflights users on 5/11. 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 7/96:21 am
STL
- LIH
2 stops17h 42m
Delta
Tue 7/148:31 pm
LIH
- STL
2 stops15h 15m
Delta
Deal found 5/11![Delta logo]()
$620
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:21 am
STL
- LIH
2 stops17h 42m
Delta
Tue 7/148:31 pm
LIH
- STL
2 stops15h 15m
Delta
Deal found 5/8![Delta logo]()
$654
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:00 am
STL
- LIH
2 stops17h 04m
Delta
Tue 6/99:55 pm
LIH
- STL
2 stops16h 08m
Delta
Deal found 5/8![Delta logo]()
$680
This Delta deal was found by Cheapflights users on 5/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:21 am
STL
- LIH
2 stops17h 41m
Delta
Wed 7/89:55 pm
LIH
- STL
2 stops16h 05m
Delta
Deal found 5/12![Delta logo]()
$684
This Delta deal was found by Cheapflights users on 5/13. 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 7/16:21 am
STL
- LIH
2 stops17h 41m
Delta
Fri 7/319:55 pm
LIH
- STL
2 stops18h 05m
Delta
Deal found 5/13![Delta logo]()
$700
Last-minute flights from St. Louis to Kaua'iDiscover last-minute flight deals from St. Louis to Kaua'i. Data last updated May 13, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Kaua'i. Data last updated May 13, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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 5/11![Alaska Airlines logo]()
$558
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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 5/11![Multiple Airlines logo]()
$563
This Delta deal was found by Cheapflights users on 5/10. 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.
Wed 5/276:21 am
STL
- LIH
2 stops17h 45m
Delta
Sat 6/69:49 pm
LIH
- STL
2 stops20h 34m
Delta
Deal found 5/10![Delta logo]()
$592
This United Airlines deal was found by Cheapflights users on 5/11. 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 6/29:06 am
STL
- LIH
1 stop11h 31m
United Airlines
Wed 6/102:31 pm
LIH
- STL
2 stops13h 08m
United Airlines
Deal found 5/11![United Airlines logo]()
$584
This American Airlines deal was found by Cheapflights users on 5/9. 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 6/28:36 am
STL
- LIH
2 stops16h 45m
American Airlines
Tue 6/99:51 pm
LIH
- STL
1 stop21h 05m
American Airlines
Deal found 5/9![American Airlines logo]()
$609
One-way flights from St. Louis to Kaua'iSearch for one-way flight options from St. Louis to Kaua'i. Find affordable one-way fares based on user searches. Data last updated May 13, 2026.
Search for one-way flight options from St. Louis to Kaua'i. Find affordable one-way fares based on user searches. Data last updated May 13, 2026.
This United Airlines deal was found by Cheapflights users on 5/11. 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 5/198:46 am
STL
- LIH
1 stop12h 01m
United Airlines
Deal found 5/11![United Airlines logo]()
$300
This Delta deal was found by Cheapflights users on 5/11. 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 5/196:21 am
STL
- LIH
2 stops17h 45m
Delta
Deal found 5/11![Delta logo]()
$368
This deal was found by Cheapflights users on 5/11. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/146:02 am
STL
- LIH
1 stop13h 38m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$397
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 May 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $558 (Alaska Airlines) |
One-way from | $300 (United Airlines) |
Popular in | July |
Cheapest in | August |
Average price | $685 |
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 May 13, 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
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Thu 7/23
6:21 am-7:03 pm
2 stops17h 42m
Lihue
Tue 7/28
9:55 pm-10:15 pm
2 stops19h 20m
$580
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Wed 5/27
6:21 am-7:06 pm
2 stops17h 45m
Lihue
Sat 6/6
9:49 pm-11:23 pm
2 stops20h 34m
$592
Quickest round-trip
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Thu 7/9
6:21 am-7:03 pm
2 stops17h 42m
Lihue
Tue 7/14
8:31 pm-4:46 pm
2 stops15h 15m
$620
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Tue 7/7
6:21 am-7:03 pm
2 stops17h 42m
Lihue
Tue 7/14
8:31 pm-4:46 pm
2 stops15h 15m
$654
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Wed 6/3
7:00 am-7:04 pm
2 stops17h 04m
Lihue
Tue 6/9
9:55 pm-7:03 pm
2 stops16h 08m
$680
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Wed 7/1
6:21 am-7:02 pm
2 stops17h 41m
Lihue
Wed 7/8
9:55 pm-7:00 pm
2 stops16h 05m
$684
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Wed 5/27
5:33 pm-11:02 am
1 stop22h 29m
Lihue
Sat 6/6
12:30 pm-8:50 am
2 stops15h 20m
$687
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Wed 7/1
6:21 am-7:02 pm
2 stops17h 41m
Lihue
Fri 7/31
9:55 pm-9:00 pm
2 stops18h 05m
$700
Cheapest one-way
Quickest one-way
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Tue 5/19
8:46 am-3:47 pm
1 stop12h 01m
$300
St. LouisLihue
STL - LIH
STLLIH
Lambert-St Louis
Tue 5/19
6:21 am-7:06 pm
2 stops17h 45m
$368
Showing 1-10 of 11 resultsSorted 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.
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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Alternative routes for St. Louis to Kaua'i
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Kaua'i by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Kaua'i by cabin class
Find flights from St. Louis to Kaua'i, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Kaua'i flights
Browse other St. Louis and Kaua'i flight options. Last updated on May 13, 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 May 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$410 | Average$563 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$446 | Average$679 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$461 | Average$769 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$492 | Average$742 | FlexibilityNo cancel fee | On-time71% |