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.

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).

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 United Airlines, American Airlines and Southwest. Something to consider prior to booking your flight.

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.

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.

Find Cheap Flights from St. Louis to Kaua'i

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Find flight deals from St. Louis to Kaua'i

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	June
Cheapest in	December
Average price	$657

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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Highest demand for flights based on searches. 14% potential increase in price ($129 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).

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Average for round-trip flights in September 2026

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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, December is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $583). Flying from St. Louis to Kaua'i in June is currently the most expensive (average of $984). 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

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.

Southwest

8.0

Very good

4,199 reviews

Reviews

1 / 20

4.0

Okay

Steven,Sep 2026

OGG - HNL

It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful

Southwest

8.0

Very good

4,199 reviews

Southwest

8.0

Very good

4,199 reviews

Reviews

1 / 20

4.0

Okay

Steven,Sep 2026

OGG - HNL

It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful

Alaska Airlines

7.9

Good

12,963 reviews

Southwest

8.0

Very good

4,199 reviews

Reviews

1 / 20

4.0

Okay

Steven,Sep 2026

OGG - HNL

It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful

United Airlines

7.4

Good

10,233 reviews

Southwest

8.0

Very good

4,199 reviews

Reviews

1 / 20

4.0

Okay

Steven,Sep 2026

OGG - HNL

It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful

American Airlines

7.0

Good

12,073 reviews

Southwest

8.0

Very good

4,199 reviews

Reviews

1 / 20

4.0

Okay

Steven,Sep 2026

OGG - HNL

It was a red eye overnight which I prefer. But this time the seat was SOOOO uncomfortable that sleeping was difficult and painful

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.
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, December is the cheapest month in which you can book a flight from St. Louis to Kaua'i (average of $583). Flying from St. Louis to Kaua'i in June is currently the most expensive (average of $984). 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.

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Top 4 airlines flying from St. Louis to Kaua'i

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$410	Average$652	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$461	Average$793	FlexibilityNo cancel fee	On-time63%
Alaska Airlines	Cheapest$469	Average$763	FlexibilityNo cancel fee	On-time75%
American Airlines	Cheapest$492	Average$758	FlexibilityNo cancel fee	On-time71%

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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from St. Louis to Kaua'i

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Insights

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

Reviews of airlines servicing Kaua'i

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.

Related info for your journey

What airport do you fly from for flights from St. Louis to Kaua'i?

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.

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 September 24, 2026.

Popular flight searches

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Top 4 airlines flying from St. Louis to Kaua'i

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Cheap flights from St. Louis (STL) to Kaua'i

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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from St. Louis to Kaua'i

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Insights

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

Reviews of airlines servicing Kaua'i

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.

Related info for your journey

What airport do you fly from for flights from St. Louis to Kaua'i?

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.

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 September 24, 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

100% Free

Book with Flexibility

Travel Smart