Cheap flights from St. Louis to Kaua'i from $347
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 7/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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, January 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 $555. The month of September is another great option to travel to Kaua'i, with average flight prices from St. Louis averaging around $560.
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 12 weeks ahead of your departure date. In general, you can expect to find flights to Kaua'i for around $717 when searching 12 weeks 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 $563 on momondo.
What is the cheapest airline that flies from Lambert-St Louis to Kaua'i?
Delta, Alaska Airlines, and United Airlines are the most popular carriers operating from Lambert-St Louis to Kaua'i
What airlines fly to Kaua'i?
American Airlines, Alaska Airlines and United Airlines are the top three most popular airlines that fly to Kaua'i from St. Louis according to our data. American Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Kaua'i. Keep in mind that there are 5 different airlines that fly to Kaua'i on a routine basis, so you have a few additional options to choose from.
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
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?
As of June 2025, there are 5 operators available to choose from 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?
Based on momondo bookings for flights between St. Louis and Kaua'i, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 19.83% of the total bookings. Other popular models include Boeing 737-700 Passenger/BBJ1 (winglets) with 16.95%, Boeing 737 MAX 8 with 15.46%, and Airbus A319 with 6.70%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom $389 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $446 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $454 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $467 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $530 | Free Cancellation | Rating 8.0 4,287 reviews |
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.