$428+ Cheap flights from St. Louis (STL) to Keflavik Intl (KEF)
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 6/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KEF
May 23 — May 301
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Keflavik Intl 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.Cheap flight deals from St. Louis to Keflavik Intl
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Best
Last-minute
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Cheapest flights from St. Louis to Keflavik IntlExplore the most affordable flight options available from St. Louis to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
Explore the most affordable flight options available from St. Louis to Keflavik Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
This KLM deal was found by Cheapflights users on 4/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1510:45 am
STL
- KEF
1 stop15h 55m
KLM
Wed 8/269:30 am
KEF
- STL
1 stop12h 15m
KLM
Deal found 4/18![KLM logo]()
$826
This Delta deal was found by Cheapflights users on 4/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/151:30 pm
STL
- KEF
2 stops15h 15m
Delta
Wed 8/269:30 am
KEF
- STL
2 stops16h 01m
Delta
Deal found 4/18![Delta logo]()
$830
This KLM deal was found by Cheapflights users on 4/22. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2412:10 pm
STL
- KEF
1 stop13h 50m
KLM
Thu 9/39:30 am
KEF
- STL
1 stop10h 01m
KLM
Deal found 4/22![KLM logo]()
$856
This Kiwi.com deal was found by Cheapflights users on 4/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:08 pm
STL
- KEF
1 stop28h 52m
Multiple Airlines
Mon 8/2410:45 am
KEF
- STL
1 stop13h 38m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$892
This United Airlines deal was found by Cheapflights users on 4/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:32 pm
STL
- KEF
2 stops34h 13m
United Airlines
Wed 8/2610:00 am
KEF
- STL
2 stops34h 38m
United Airlines
Deal found 4/20![United Airlines logo]()
$913
This Air Canada deal was found by Cheapflights users on 4/21. 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.
Sat 8/152:40 pm
STL
- KEF
2 stops36h 15m
Air Canada
Wed 8/2610:00 am
KEF
- STL
1 stop15h 07m
Air Canada
Deal found 4/21![Air Canada logo]()
$930
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:55 pm
STL
- KEF
1 stop8h 55m
United Airlines
Wed 9/309:15 am
KEF
- STL
2 stops36h 11m
United Airlines
Deal found 4/19![United Airlines logo]()
$935
This United Airlines deal was found by Cheapflights users on 4/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2312:10 pm
STL
- KEF
1 stop14h 45m
United Airlines
Fri 9/49:15 am
KEF
- STL
1 stop14h 27m
United Airlines
Deal found 4/20![United Airlines logo]()
$947
Best flights from St. Louis to Keflavik IntlDiscover carefully curated flight deals from St. Louis to Keflavik Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
Discover carefully curated flight deals from St. Louis to Keflavik Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
This KLM deal was found by Cheapflights users on 4/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1510:45 am
STL
- KEF
1 stop15h 55m
KLM
Wed 8/269:30 am
KEF
- STL
1 stop12h 15m
KLM
Deal found 4/18![KLM logo]()
$826
This United Airlines deal was found by Cheapflights users on 4/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:32 pm
STL
- KEF
2 stops34h 13m
United Airlines
Wed 8/2610:00 am
KEF
- STL
2 stops34h 38m
United Airlines
Deal found 4/21![United Airlines logo]()
$913
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:55 pm
STL
- KEF
1 stop8h 55m
United Airlines
Wed 9/309:15 am
KEF
- STL
2 stops36h 11m
United Airlines
Deal found 4/19![United Airlines logo]()
$935
This KLM deal was found by Cheapflights users on 4/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/121:27 pm
STL
- KEF
2 stops15h 03m
KLM
Wed 5/209:30 am
KEF
- STL
1 stop10h 01m
KLM
Deal found 4/18![KLM logo]()
$1,059
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/79:16 am
STL
- KEF
1 stop18h 34m
United Airlines
Mon 9/1410:00 am
KEF
- STL
2 stops31h 13m
United Airlines
Deal found 4/19![United Airlines logo]()
$990
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2812:10 pm
STL
- KEF
1 stop14h 45m
United Airlines
Thu 9/1010:00 am
KEF
- STL
1 stop15h 00m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,033
Last-minute flights from St. Louis to Keflavik IntlDiscover last-minute flight deals from St. Louis to Keflavik Intl. Data last updated April 23, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Keflavik Intl. Data last updated April 23, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 4/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/295:21 pm
STL
- KEF
2 stops33h 29m
Finnair
Wed 5/65:15 pm
KEF
- STL
2 stops34h 04m
Finnair
Deal found 4/22![Finnair logo]()
$1,283
This Delta deal was found by Cheapflights users on 4/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/412:45 pm
STL
- KEF
1 stop15h 45m
Delta
Sun 5/179:30 am
KEF
- STL
1 stop10h 01m
Delta
Deal found 4/18![Delta logo]()
$1,115
This KLM deal was found by Cheapflights users on 4/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/49:59 am
STL
- KEF
2 stops18h 31m
Multiple Airlines
Sun 5/179:30 am
KEF
- STL
1 stop18h 51m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$1,119
This KLM deal was found by Cheapflights users on 4/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/124:25 pm
STL
- KEF
1 stop12h 05m
KLM
Wed 5/209:30 am
KEF
- STL
1 stop10h 01m
KLM
Deal found 4/20![KLM logo]()
$1,055
This KLM deal was found by Cheapflights users on 4/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/121:27 pm
STL
- KEF
2 stops15h 03m
Multiple Airlines
Wed 5/2011:25 am
KEF
- STL
2 stops14h 44m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,059
This KLM deal was found by Cheapflights users on 4/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/145:36 pm
STL
- KEF
1 stop9h 04m
KLM
Thu 5/219:30 am
KEF
- STL
1 stop10h 01m
KLM
Deal found 4/20![KLM logo]()
$1,195
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/1410:19 am
STL
- KEF
2 stops16h 21m
Delta
Thu 5/2111:25 am
KEF
- STL
2 stops15h 13m
Delta
Deal found 4/20![Delta logo]()
$1,199
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/194:44 pm
STL
- KEF
2 stops58h 46m
United Airlines
Sun 5/3112:00 pm
KEF
- STL
2 stops15h 45m
United Airlines
Deal found 4/19![United Airlines logo]()
$1,244
This Orbitz deal was found by Cheapflights users on 4/20. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:05 am
STL
- KEF
2 stops35h 20m
Multiple Airlines
Mon 5/2512:20 am
KEF
- STL
2 stops20h 26m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$1,252
One-way flights from St. Louis to Keflavik IntlSearch for one-way flight options from St. Louis to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
Search for one-way flight options from St. Louis to Keflavik Intl. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/212:56 pm
STL
- KEF
2 stops35h 44m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$428
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/193:30 pm
STL
- KEF
3 stops46h 45m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$544
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/155:27 pm
STL
- KEF
2 stops31h 58m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$577
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:30 pm
STL
- KEF
3 stops35h 45m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$582
This Justfly.com deal was found by Cheapflights users on 4/18. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:10 pm
STL
- KEF
1 stop14h 45m
Air Canada
Deal found 4/18![Air Canada logo]()
$584
This Delta deal was found by Cheapflights users on 4/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/189:45 am
STL
- KEF
2 stops18h 45m
Delta
Deal found 4/18![Delta logo]()
$585
This United Airlines deal was found by Cheapflights users on 4/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:30 am
STL
- KEF
3 stops19h 25m
United Airlines
Deal found 4/18![United Airlines logo]()
$588
This Kiwi.com deal was found by Cheapflights users on 4/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:30 pm
STL
- KEF
3 stops46h 50m
Multiple Airlines
Deal found 4/18![Multiple Airlines logo]()
$594
This United Airlines deal was found by Cheapflights users on 4/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/168:15 pm
STL
- KEF
2 stops55h 30m
United Airlines
Deal found 4/18![United Airlines logo]()
$606
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/215:00 pm
STL
- KEF
2 stops33h 40m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$623
Find flight deals from St. Louis to Keflavik Intl
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Keflavik Intl (KEF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $826 (KLM) |
One-way from | $428 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Keflavik Intl 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 April 23, 2026.
Use the filters below to find and compare flights from St. Louis to Reykjavik Keflavik Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Sat 8/15
10:45 am-7:40 am
1 stop15h 55m
Reykjavik Keflavik Intl
Wed 8/26
9:30 am-4:45 pm
1 stop12h 15m
$826
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Sat 8/15
5:32 pm-8:45 am
2 stops34h 13m
Reykjavik Keflavik Intl
Wed 8/26
10:00 am-3:38 pm
2 stops34h 38m
$913
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Tue 9/1
6:55 pm-8:50 am
1 stop8h 55m
Reykjavik Keflavik Intl
Wed 9/30
9:15 am-4:26 pm
2 stops36h 11m
$935
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Mon 9/7
9:16 am-8:50 am
1 stop18h 34m
Reykjavik Keflavik Intl
Mon 9/14
10:00 am-12:13 pm
2 stops31h 13m
$990
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Fri 8/28
12:10 pm-7:55 am
1 stop14h 45m
Reykjavik Keflavik Intl
Thu 9/10
10:00 am-8:00 pm
1 stop15h 00m
$1,033
Quickest round-trip
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Tue 5/12
1:27 pm-9:30 am
2 stops15h 03m
Reykjavik Keflavik Intl
Wed 5/20
9:30 am-2:31 pm
1 stop10h 01m
$1,059
Cheapest one-way
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Sun 6/21
2:56 pm-7:40 am
2 stops35h 44m
$428
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Sun 10/18
2:18 pm-9:30 am
2 stops14h 12m
$585
Quickest one-way
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Sun 10/18
4:13 pm-9:30 am
1 stop12h 17m
$585
St. LouisReykjavik
STL - KEF
STLKEF
Lambert-St Louis
Mon 10/19
1:30 pm-9:30 am
2 stops15h 00m
$585
Showing 1-10 of 15 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Keflavik Intl
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Keflavik Intl in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Reykjavik Keflavik Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Reykjavik Keflavik Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Reykjavik Keflavik Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Reykjavik Keflavik Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Reykjavik Keflavik Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Keflavik Intl
Have a flexible travel schedule? Discover the best time to fly to Keflavik Intl from St. Louis with our price prediction graph.
STL-KEF
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 Keflavik Intl
Get insights into the airlines that provide service to Keflavik Intl. 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 Keflavik Intl. Reviews last updated April 23, 2026.
See what other customers who have flown with Delta,KLM, andUnited Airlines from St. Louis to Reykjavik Keflavik Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Keflavik Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Reykjavik Keflavik Intl Airport?
Book flights to Reykjavik Keflavik Intl Airport if you plan to visit one of these locationsKeflavik
Hveragerdi
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Other flights to Keflavik Intl
Explore flights to Keflavik Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 23, 2026.
St. Louis and Keflavik Intl flights
Browse other St. Louis and Keflavik Intl flight options. Last updated on April 23, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on April 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from St. Louis to Keflavik Intl
Discover the top 4 airlines that operate flights from St. Louis to Keflavik Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$592 | Average$1,074 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$604 | Average$870 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$636 | Average$942 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$756 | Average$1,080 | FlexibilityNo cancel fee | On-time75% |