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Cheap flights from St. Louis to Kaua'i from $246

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Kaua'i departing on 3/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Kaua'i

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:41 am - 5:04 pm
STL
-
LIH
12h 23m1 stop
United Airlines Logo
8:40 pm - 1:19 pm
LIH
-
STL
12h 39m1 stop
$421United Airlines
Tue, Mar 3 - Thu, Mar 5
United Airlines Logo
8:41 am - 5:04 pm
STL
-
LIH
12h 23m1 stop
United Airlines Logo
8:40 pm - 2:43 pm
LIH
-
STL
14h 03m2 stops
$427United Airlines
Tue, Mar 3 - Thu, Mar 5
Multiple Airlines Logo
7:00 am - 8:57 am
STL
-
LIH
29h 57m2 stops
Multiple Airlines Logo
7:45 pm - 1:51 pm
LIH
-
STL
14h 06m2 stops
$461Multiple Airlines
Tue, Mar 3 - Thu, Mar 5
American Airlines Logo
6:00 am - 6:39 pm
STL
-
LIH
16h 39m2 stops
American Airlines Logo
11:00 pm - 4:14 pm
LIH
-
STL
13h 14m2 stops
$462American Airlines
Sun, Jan 4 - Fri, Jan 16
United Airlines Logo
8:41 am - 10:44 pm
STL
-
LIH
18h 03m2 stops
United Airlines Logo
8:40 pm - 1:14 pm
LIH
-
STL
12h 34m1 stop
$486United Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
2:47 pm - 1:49 pm
STL
-
LIH
27h 02m2 stops
Multiple Airlines Logo
11:19 pm - 1:51 pm
LIH
-
STL
10h 32m1 stop
$488Multiple Airlines
Fri, Feb 20 - Thu, Feb 26
United Airlines Logo
11:25 am - 10:44 pm
STL
-
LIH
15h 19m2 stops
United Airlines Logo
11:59 pm - 8:26 pm
LIH
-
STL
16h 27m2 stops
$492United Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
2:47 pm - 8:57 am
STL
-
LIH
22h 10m2 stops
Multiple Airlines Logo
7:45 pm - 11:59 pm
LIH
-
STL
24h 14m2 stops
$493Multiple Airlines
Fri, Feb 20 - Thu, Feb 26
American Airlines Logo
6:00 am - 6:39 pm
STL
-
LIH
16h 39m2 stops
American Airlines Logo
11:00 pm - 4:14 pm
LIH
-
STL
13h 14m2 stops
$512American Airlines
Sun, Jan 4 - Fri, Jan 16
American Airlines Logo
6:00 am - 6:39 pm
STL
-
LIH
16h 39m2 stops
American Airlines Logo
11:00 pm - 11:59 pm
LIH
-
STL
20h 59m1 stop
$514American Airlines
Sun, Jan 4 - Fri, Jan 16

United Airlines flights from St. Louis to Kaua'i

Our best United Airlines deals on St. Louis to Kaua'i flight tickets
United Airlines
Mar 3
STL8:41 amLambert-St Louis
12h 23m
1 stop
LIH5:04 pmLihue
Mar 5
LIH8:40 pmLihue
12h 39m
1 stop
STL1:19 pmLambert-St Louis
$421
Find similar
United Airlines
Mar 3
STL8:41 amLambert-St Louis
12h 23m
1 stop
LIH5:04 pmLihue
Mar 5
LIH8:40 pmLihue
14h 03m
2 stops
STL2:43 pmLambert-St Louis
$427
Find similar
United Airlines
Feb 26
STL8:41 amLambert-St Louis
18h 03m
2 stops
LIH10:44 pmLihue
Mar 2
LIH8:40 pmLihue
12h 34m
1 stop
STL1:14 pmLambert-St Louis
$486
Find similar

American Airlines flights from St. Louis to Kaua'i

Our best American Airlines deals on St. Louis to Kaua'i flight tickets
American Airlines
Jan 4
STL6:00 amLambert-St Louis
16h 39m
2 stops
LIH6:39 pmLihue
Jan 16
LIH11:00 pmLihue
13h 14m
2 stops
STL4:14 pmLambert-St Louis
$462
Find similar
American Airlines
Jan 4
STL6:00 amLambert-St Louis
16h 39m
2 stops
LIH6:39 pmLihue
Jan 16
LIH11:00 pmLihue
13h 14m
2 stops
STL4:14 pmLambert-St Louis
$512
Find similar
American Airlines
Jan 4
STL6:00 amLambert-St Louis
16h 39m
2 stops
LIH6:39 pmLihue
Jan 16
LIH11:00 pmLihue
20h 59m
1 stop
STL11:59 pmLambert-St Louis
$514
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 14, 2025.
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 3/3

8:41 am-5:04 pm

1 stop12h 23m

Lihue

Thu 3/5

8:40 pm-1:19 pm

1 stop12h 39m

$421

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 3/3

8:41 am-5:04 pm

1 stop12h 23m

Lihue

Thu 3/5

8:40 pm-2:43 pm

2 stops14h 03m

$427

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Tue 3/3

7:00 am-8:57 am

2 stops29h 57m

Lihue

Thu 3/5

7:45 pm-1:51 pm

2 stops14h 06m

$461

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 1/4

6:00 am-6:39 pm

2 stops16h 39m

Lihue

Fri 1/16

11:00 pm-4:14 pm

2 stops13h 14m

$462

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 2/26

8:41 am-10:44 pm

2 stops18h 03m

Lihue

Mon 3/2

8:40 pm-1:14 pm

1 stop12h 34m

$486

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 2/20

2:47 pm-1:49 pm

2 stops27h 02m

Lihue

Thu 2/26

11:19 pm-1:51 pm

1 stop10h 32m

$488

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Thu 2/26

11:25 am-10:44 pm

2 stops15h 19m

Lihue

Mon 3/2

11:59 pm-8:26 pm

2 stops16h 27m

$492

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Fri 2/20

2:47 pm-8:57 am

2 stops22h 10m

Lihue

Thu 2/26

7:45 pm-11:59 pm

2 stops24h 14m

$493

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 1/4

6:00 am-6:39 pm

2 stops16h 39m

Lihue

Fri 1/16

11:00 pm-4:14 pm

2 stops13h 14m

$512

St. LouisLihue

STL - LIH

STLLIH

Lambert-St Louis

Sun 1/4

6:00 am-6:39 pm

2 stops16h 39m

Lihue

Fri 1/16

11:00 pm-11:59 pm

1 stop20h 59m

$514

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

See travel insights to Kaua'i from

How to get the cheapest flight ticket from St. Louis to Kaua'i

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Kaua'i?

In general, November is the cheapest month to fly from St. Louis to Kaua'i. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $552. The month of August is another great option to travel to Kaua'i, with average flight prices from St. Louis averaging around $588.

What is the cheapest day to depart on your flight to Kaua'i?

According to our data, Tuesday is the cheapest day to fly to Kaua'i from St. Louis. The lowest ticket price found for a Tuesday departure recently was $585. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $884. These prices are subject to change though, so be sure to set up a Price Alert for flights to Kaua'i.

What is the cheapest time of day to depart on your flight to Kaua'i?

The cheapest time of day to fly to Kaua'i is in the evening when flights can be purchased for as low as $622. In contrast, the most expensive time of day to depart to Kaua'i is in the afternoon when prices are around $1,338.

How far in advance should I book a flight to Kaua'i?

You are more likely to see cheaper flights to Kaua'i from St. Louis when booking week ahead of your departure date. In general, you can expect to find flights to Kaua'i for around $752 when searching week out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Kaua'i from St. Louis for as low as $521 on momondo.

Can stopping save me money on St. Louis to Kaua'i flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Kaua'i.

Cheap St. Louis to Kaua'i flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Kaua'i

Fastest flight time

11h 32m

Direct flights

None
The fastest flight from St. Louis to Kaua'i takes 11h 32m
There are no direct flights from St. Louis to Kaua'i. There are no popular flight routes from St. Louis to Kaua'i.
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Kaua'i?

    Prices for flights from Lambert-St Louis Airport to Kaua'i are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Kaua'i?

  • How old do you have to be to fly from Lambert-St Louis Airport to Kaua'i?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Kaua'i.

  • What documentation or ID do you need to fly to Kaua'i?

    The travel and health documents required for your trip to Kaua'i can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Kaua'i. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from St. Louis to Kaua'i?

Best airlines flying from St. Louis to Kaua'i

Compare and see reviews for airlines that fly from St. Louis to Kaua'i with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $308Free CancellationRating
7.9
8,007 reviews
Search Delta flights
American AirlinesPriceFrom $416Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
United AirlinesPriceFrom $446Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $451Free CancellationRating
8.0
11,448 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $477Free CancellationRating
7.9
4,251 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Kaua'i?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Kaua'i from St. Louis.

Can I find flights from St. Louis to Kaua'i with flexible booking policies on momondo?

All flight searches from St. Louis to Kaua'i on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from St. Louis to Kaua'i?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Kaua'i from St. Louis.

I’m not ready to book a flight from St. Louis to Kaua'i right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Kaua'i from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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