HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Kaua'i

$245+ 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 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

Keep the following information in mind while searching for St. Louis to Kaua'i flight deals. Data was last updated January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$456
(Expedia)

One-way from

$245
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$597
Provider with most accurate pricing for Lambert-St Louis-Lihue flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Lihue flights.
Search Deals
From Lambert-St Louis to Kaua'i
Search Deals
One-way flight from Lambert-St Louis to Kaua'i
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 15, 2026.

This Expedia deal was found by Cheapflights users on 1/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
STL
-
LIH
1 stop19h 26m
Alaska Airlines
Tue 5/510:46 am
LIH
-
STL
1 stop24h 04m
Alaska Airlines
Deal found 1/13$456
This Expedia deal was found by Cheapflights users on 1/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
STL
-
LIH
1 stop19h 26m
Multiple Airlines
Tue 5/51:54 pm
LIH
-
STL
2 stops20h 56m
Multiple Airlines
Deal found 1/13$461
This American Airlines deal was found by Cheapflights users on 1/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/185:12 am
STL
-
LIH
2 stops16h 02m
American Airlines
Mon 2/2310:30 pm
LIH
-
STL
2 stops14h 43m
American Airlines
Deal found 1/13$468
This Expedia deal was found by Cheapflights users on 1/15. 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 5/57:00 am
STL
-
LIH
1 stop19h 26m
Alaska Airlines
Sun 5/1010:26 pm
LIH
-
STL
1 stop12h 24m
Alaska Airlines
Deal found 1/15$483
This Expedia deal was found by Cheapflights users on 1/15. 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 5/57:00 am
STL
-
LIH
1 stop19h 26m
Multiple Airlines
Sun 5/101:14 pm
LIH
-
STL
2 stops21h 36m
Multiple Airlines
Deal found 1/15$489
This American Airlines deal was found by Cheapflights users on 1/14. 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.
Fri 2/277:58 am
STL
-
LIH
1 stop12h 41m
American Airlines
Fri 3/610:30 pm
LIH
-
STL
2 stops12h 58m
American Airlines
Deal found 1/14$498
This Southwest deal was found by Cheapflights users on 1/14. 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.
Thu 5/76:00 am
STL
-
LIH
1 stop12h 10m
Southwest
Wed 5/138:10 pm
LIH
-
STL
1 stop10h 35m
Southwest
Deal found 1/14$530

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 15, 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

Wed 2/18

5:12 am-5:14 pm

2 stops16h 02m

Lihue

Mon 2/23

10:30 pm-5:13 pm

2 stops14h 43m

$468

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 4/13

7:00 am-9:29 pm

1 stop19h 29m

Lihue

Mon 4/20

5:10 pm-11:59 pm

2 stops25h 49m

$488

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 2/27

7:58 am-4:39 pm

1 stop12h 41m

Lihue

Fri 3/6

10:30 pm-3:28 pm

2 stops12h 58m

$498

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 3/23

4:20 pm-12:52 pm

2 stops25h 32m

Lihue

Tue 4/7

9:00 pm-11:59 pm

2 stops21h 59m

$499

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

$514

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 4/14

7:00 am-5:34 pm

2 stops15h 34m

Lihue

Mon 4/20

9:00 pm-11:59 pm

2 stops21h 59m

$526

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 2/27

2:47 pm-10:49 am

2 stops24h 02m

Lihue

Fri 3/6

4:16 pm-1:51 pm

2 stops17h 35m

$546

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 4/15

7:00 am-9:29 pm

1 stop19h 29m

Lihue

Mon 4/20

4:00 pm-11:59 pm

2 stops26h 59m

$548

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 3/11

8:12 pm-12:39 pm

2 stops21h 27m

$245

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 3/11

7:40 am-9:57 pm

2 stops19h 17m

$287

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 16 results
1
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 15, 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
11,721 reviews

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Alaska Airlines
8.0
Very good
11,721 reviews
Alaska Airlines
8.0
Very good
11,721 reviews

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Southwest
8.0
Very good
4,258 reviews
Alaska Airlines
8.0
Very good
11,721 reviews

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
Delta
7.9
Good
8,051 reviews
Alaska Airlines
8.0
Very good
11,721 reviews

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
United Airlines
7.4
Good
9,164 reviews
Alaska Airlines
8.0
Very good
11,721 reviews

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading
American Airlines
7.2
Good
11,136 reviews
Alaska Airlines
8.0
Very good
11,721 reviews

Food

7.1

Entertainment

7.0

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

STS - LAX

Enjoyed staff assistance from ticking thru tsa , boarding and in the plane Couldn’t pick a seat except upgrading

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 $468, American Airlines can have you in Kaua'i from St. Louis in 16h 02m. St. Louis and Kaua'i are separated by a distance of 4171 mi.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Kaua'i

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Honolulu flights
Kansas City to Honolulu flights
St. Louis to Kailua-Kona flights
St. Louis to Kahului flights
Kansas City to Kahului flights
Kansas City to Lihue flights
Kansas City to Kailua-Kona flights
St. Louis to Lihue flights
Springfield to Honolulu flights
Kansas City to Hilo flights
Springfield to Lihue flights
Springfield to Kailua-Kona flights
Springfield to Kahului flights
St. Louis to Hilo flights
Columbia to Honolulu flights
Joplin to Honolulu flights
Springfield to Hilo flights
St. Louis to Kapalua flights
Joplin to Kailua-Kona flights
Columbia to Lihue flights
Kansas City to Waimea (Big Island) flights
St. Louis to Waimea (Big Island) flights
Kansas City to Hana flights
Kansas City to Kapalua flights
St. Louis to Hana flights

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 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$308Average$467FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$416Average$742FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$440Average$792FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$451Average$583FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$477Average$793FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.