HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$732+ Cheap flights from Keflavik Intl (KEF) to St. Louis (STL)

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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
KEF — STL
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Keflavik Intl to St. Louis 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.

Find flight deals from Keflavik Intl to St. Louis

One-way flights from Keflavik Intl to St. Louis
Search for one-way flight options from Keflavik Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated julio 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/139:35 amKEF - STL
2 stops18h 47mWestJet
Deal found 7/30$732
This Thrive Travel deal was found by Cheapflights users on 7/30. 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 Thrive Travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/1312:00 pmKEF - STL
1 stop15h 45mLufthansa
Deal found 7/30$810
This Air Canada deal was found by Cheapflights users on 7/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/139:30 amKEF - STL
3 stops17h 05mAir Canada
Deal found 7/30$1,427

Cheapflights Fare Finder

 
Customize your flight search to find flights from Keflavik Intl to St. Louis 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 julio 30, 2025.
Use the filters below to find and compare flights from Reykjavik Keflavik Intl Airport to St. Louis that are best for you.

Fly from

Keflavik Intl

Fly to

St. Louis

Route

Depart

Return

Price

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

mié. 8/13

9:35 am-11:22 pm

2 stops18h 47m

$732

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

mié. 8/13

12:00 pm-10:45 pm

1 stop15h 45m

$810

ReykjavikSt. Louis

KEF - STL

KEFSTL

Reykjavik Keflavik Intl

mié. 8/13

9:30 am-9:35 pm

3 stops17h 05m

$1,427

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Best time to book a flight from Keflavik Intl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Keflavik Intl 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.

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated julio 30, 2025.
See what other customers who have flown with WestJet, Air Canada, and Lufthansa from Reykjavik Keflavik Intl Airport to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
WestJet
7.2
Good
2,975 reviews

Comfort

7.0

Crew

7.9

Entertainment

6.1

Boarding

7.4

Overall

7.2

Food

6.2

Reviews

1 / 20
4.0
Okay

Kim,May 2025

YEG - YYJ

Some of the crew weren't the most helpful or pleasant.
WestJet
7.2
Good
2,975 reviews
WestJet
7.2
Good
2,975 reviews

Comfort

7.0

Crew

7.9

Entertainment

6.1

Boarding

7.4

Overall

7.2

Food

6.2

Reviews

1 / 20
4.0
Okay

Kim,May 2025

YEG - YYJ

Some of the crew weren't the most helpful or pleasant.
Air Canada
7.1
Good
9,837 reviews
WestJet
7.2
Good
2,975 reviews

Comfort

7.0

Crew

7.9

Entertainment

6.1

Boarding

7.4

Overall

7.2

Food

6.2

Reviews

1 / 20
4.0
Okay

Kim,May 2025

YEG - YYJ

Some of the crew weren't the most helpful or pleasant.
Lufthansa
6.8
Okay
7,269 reviews
WestJet
7.2
Good
2,975 reviews

Comfort

7.0

Crew

7.9

Entertainment

6.1

Boarding

7.4

Overall

7.2

Food

6.2

Reviews

1 / 20
4.0
Okay

Kim,May 2025

YEG - YYJ

Some of the crew weren't the most helpful or pleasant.

Related info for your journey

Find useful and relevant information for your journey from Keflavik Intl to St. Louis. 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 into for flights to St. Louis from Reykjavik Keflavik Intl?

    If you book a flight to St. Louis from Reykjavik Keflavik Intl, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 0 flights from Reykjavik Keflavik Intl to Lambert-St Louis per day from 0 different airlines.

  • What are the cheapest airlines to fly from Reykjavik Keflavik Intl Airport to St. Louis one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as $732. Users have also found prices from $810 and $1,427 on Lufthansa and Air Canada, respectively.

  • Can I find deals for flights from Keflavik Intl to St. Louis that include hotel bookings?

    Yes. In addition to deals on Keflavik Intl to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Keflavik Intl to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Keflavik Intl to St. Louis.

  • Can I find deals for business class flights from Keflavik Intl to St. Louis?

    Yes. Cheapflights offers flight deals from Keflavik Intl to St. Louis 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 Reykjavik Keflavik Intl Airport to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Reykjavik Keflavik Intl Airport to St. Louis (average of $311). Flying from Reykjavik Keflavik Intl Airport to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Festus
Farmington

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.

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.