What are the cheapest airlines to fly from St. Louis to Kaua'i one-way?

For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $306. Users have also found prices from $351 and $413 on Southwest and Alaska Airlines, respectively.

What are the most popular airlines that fly from St. Louis to Kaua'i?

The most popular airlines flying from St. Louis to Kaua'i are American Airlines, Alaska Airlines and Delta. Something to consider prior to booking your flight.

How far in advance should I book a flight from St. Louis to Kaua'i?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 35 days in advance, which can save you up to 37% on flights from St. Louis to Kaua'i compared to booking the week you need them. Waiting 35 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $533. For sooner than that we have options available in the next 3 days from $606.

What is the cheapest month to fly from St. Louis to Kaua'i?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, January can be a great choice for travel to Kaua'i. Flights to Kaua'i from St. Louis in January are about $729 on average during January, but can be found for as low as $399.

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.

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.

$306+ Flights from St. Louis to Kaua'i

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Cheap flight deals from St. Louis to Kaua'i

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$467 (Alaska Airlines)
One-way from	$306 (American Airlines)
Popular in	July
Cheapest in	January
Average price	$686

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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Highest demand for flights based on searches. 12% potential increase in price ($102 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).

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Average for round-trip flights in April 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 April 29, 2025.

Tue 5/138:09 amSTL - LIH

1 stop11h 46mAmerican Airlines

Tue 5/209:40 pmLIH - STL

1 stop11h 09mAmerican Airlines

Deal found 4/29

$486

Tue 10/76:00 amSTL - LIH

2 stops16h 23mDelta

Mon 10/139:45 pmLIH - STL

2 stops15h 12mDelta

Deal found 4/28

$499

Sat 11/12:55 pmSTL - LIH

2 stops20h 29mAlaska Airlines

Sat 11/89:00 pmLIH - STL

2 stops22h 56mAlaska Airlines

Deal found 4/28

$514

Sun 11/95:45 amSTL - LIH

2 stops14h 30mSouthwest

Mon 11/179:10 pmLIH - STL

2 stops11h 55mSouthwest

Deal found 4/28

$535

Wed 5/71:41 pmSTL - LIH

3 stops21h 36mUnited Airlines

Wed 5/2112:58 pmLIH - STL

2 stops16h 41mUnited Airlines

Deal found 4/28

$750

Wed 5/71:41 pmSTL - LIH

3 stops21h 36mMultiple Airlines

Wed 5/146:00 amLIH - STL

2 stops12h 59mMultiple Airlines

Deal found 4/28

$1,151

Best flights from St. Louis to Kaua'i
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, 2025.

Tue 9/166:00 amSTL - LIH

1 stop20h 30mAlaska Airlines

Tue 9/2310:30 pmLIH - STL

1 stop11h 09mAlaska Airlines

Deal found 4/29

$467

Tue 5/138:09 amSTL - LIH

1 stop11h 46mAmerican Airlines

Tue 5/209:40 pmLIH - STL

1 stop11h 09mAmerican Airlines

Deal found 4/29

$486

Tue 10/76:00 amSTL - LIH

2 stops16h 23mDelta

Mon 10/139:45 pmLIH - STL

2 stops15h 12mDelta

Deal found 4/28

$499

Thu 8/78:00 amSTL - LIH

2 stops17h 25mUnited Airlines

Mon 8/1110:15 pmLIH - STL

2 stops15h 38mUnited Airlines

Deal found 4/29

$637

Thu 8/75:35 amSTL - LIH

1 stop12h 15mSouthwest

Mon 8/118:40 pmLIH - STL

2 stops11h 50mSouthwest

Deal found 4/29

$712

Last-minute flights from St. Louis to Kaua'i
Discover last-minute flight deals from St. Louis to Kaua'i. Data last updated April 29, 2025 and is based on user searches.

Wed 5/78:09 amSTL - LIH

1 stop11h 46mAmerican Airlines

Wed 5/212:02 pmLIH - STL

2 stops14h 47mAmerican Airlines

Deal found 4/28

$491

Wed 5/77:30 amSTL - LIH

2 stops16h 30mDelta

Wed 5/148:25 pmLIH - STL

2 stops15h 35mDelta

Deal found 4/28

$552

Wed 5/71:41 pmSTL - LIH

3 stops21h 36mUnited Airlines

Wed 5/2112:58 pmLIH - STL

2 stops16h 41mUnited Airlines

Deal found 4/28

$750

Wed 5/71:41 pmSTL - LIH

3 stops21h 36mMultiple Airlines

Wed 5/146:00 amLIH - STL

2 stops12h 59mMultiple Airlines

Deal found 4/28

$1,151

Thu 5/85:00 amSTL - LIH

2 stops16h 00mSouthwest

Thu 5/157:05 pmLIH - STL

2 stops13h 00mSouthwest

Deal found 4/28

$654

Tue 5/138:09 amSTL - LIH

1 stop11h 46mAmerican Airlines

Tue 5/209:40 pmLIH - STL

1 stop11h 09mAmerican Airlines

Deal found 4/29

$486

Wed 5/146:00 amSTL - LIH

2 stops16h 49mDelta

Wed 5/218:25 pmLIH - STL

2 stops13h 35mDelta

Deal found 4/28

$502

Wed 5/146:30 amSTL - LIH

1 stop20h 02mAlaska Airlines

Wed 5/2110:33 pmLIH - STL

1 stop10h 34mAlaska Airlines

Deal found 4/28

$648

One-way flights from St. Louis to Kaua'i
Search for one-way flight options from St. Louis to Kaua'i. Find affordable one-way fares based on user searches. Data last updated April 29, 2025.

Fri 5/95:00 amSTL - LIH

2 stops14h 55mAmerican Airlines

Deal found 4/29

$306

Fri 5/95:00 amSTL - LIH

1 stop12h 50mSouthwest

Deal found 4/29

$351

Mon 7/710:08 amSTL - LIH

2 stops16h 46mAlaska Airlines

Deal found 4/28

$413

Mon 7/76:00 amSTL - LIH

1 stop18h 38mUnited Airlines

Deal found 4/28

$495

Cheapflights Fare Finder

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

Price

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 5/13

8:09 am-2:55 pm

1 stop11h 46m

Lihue

Tue 5/20

9:40 pm-1:49 pm

1 stop11h 09m

$486

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 5/14

6:00 am-5:49 pm

2 stops16h 49m

Lihue

Wed 5/21

8:25 pm-3:00 pm

2 stops13h 35m

$502

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 5/14

6:30 am-9:32 pm

1 stop20h 02m

Lihue

Wed 5/21

10:33 pm-2:07 pm

1 stop10h 34m

$648

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 5/8

5:00 am-4:00 pm

2 stops16h 00m

Lihue

Thu 5/15

7:05 pm-1:05 pm

2 stops13h 00m

$654

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 5/7

1:41 pm-6:17 am

3 stops21h 36m

Lihue

Wed 5/21

12:58 pm-10:39 am

2 stops16h 41m

$750

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Wed 5/7

1:41 pm-6:17 am

3 stops21h 36m

Lihue

Wed 5/14

6:00 am-11:59 pm

2 stops12h 59m

$1,151

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 5/9

5:00 am-2:55 pm

2 stops14h 55m

$306

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 5/9

5:00 am-12:50 pm

1 stop12h 50m

$351

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 7/7

10:08 am-9:54 pm

2 stops16h 46m

$413

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Mon 7/7

6:00 am-7:38 pm

1 stop18h 38m

$495

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 $683). 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?

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

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

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

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from St. Louis to Kaua'i to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,968 reviews

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

9,968 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

4,295 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

7,936 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

8,696 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

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

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 American Airlines. According to our data, you can fly for as low as $306. Users have also found prices from $351 and $413 on Southwest and Alaska 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 $683). 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

Alternative routes for St. Louis to Kaua'i

Top 5 airlines flying from St. Louis to Kaua'i

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$389	Average$700	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$446	Average$692	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$454	Average$882	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$467	Average$657	FlexibilityNo cancel fee	On-time75%
Southwest	Cheapest$530	Average$769	FlexibilityNo cancel fee	On-time63%

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$306+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Kaua'i with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

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 April 29, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Kaua'i

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, 2025.

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, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Kaua'i that are best for you.

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.

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?

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 April 29, 2025.

Rainfall in Kaua'i by month

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

Temperature in Kaua'i by month

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

Reviews of airlines servicing Kaua'i

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from St. Louis to Kaua'i to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

What are the cheapest airlines to fly from St. Louis to Kaua'i one-way?

Can I find deals for flights from St. Louis to Kaua'i that include hotel bookings?

How can I find direct flights from St. Louis to Kaua'i?

Can I find deals for business class flights from St. Louis to Kaua'i?

What is the cheapest month to book a flight from St. Louis to Kaua'i?

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.

Top 5 airlines flying from St. Louis to Kaua'i

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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 April 29, 2025.