$628+ Cheap flights from St. Louis (STL) to Keflavik Intl (KEF)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — KEF
Nov 7 — Nov 141
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
Cheapest
Best
Last-minute
One-way
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 October 8, 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 October 8, 2026.
This FlightHub deal was found by Cheapflights users on 10/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:25 pm -
2 stops21h 55m
Thu 11/511:35 am -
2 stops42h 19m
Deal found 10/3![Scandinavian Airlines logo]()
$768
This FlightHub deal was found by Cheapflights users on 10/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/72:33 pm -
2 stops38h 17m
Sat 12/1211:35 am -
2 stops40h 03m
Deal found 10/7![Scandinavian Airlines logo]()
$782
This United Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 11/46:50 pm -
1 stop9h 10m
Thu 11/1912:00 pm -
1 stop13h 23m
Deal found 10/7![United Airlines logo]()
$786
This United deal was found by Cheapflights users on 10/7. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/151:08 pm -
1 stop14h 52m
Tue 12/13:20 pm -
1 stop28h 25m
Deal found 10/7![Multiple Airlines logo]()
$788
This United Airlines deal was found by Cheapflights users on 10/3. 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.
Wed 10/286:50 pm -
1 stop10h 10m
Thu 11/512:00 pm -
1 stop17h 24m
Deal found 10/3![United Airlines logo]()
$811
This United Airlines deal was found by Cheapflights users on 10/7. 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 11/18:50 am -
2 stops19h 10m
Thu 11/1912:00 pm -
2 stops15h 52m
Deal found 10/7![United Airlines logo]()
$816
This Expedia deal was found by Cheapflights users on 10/7. 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.
Tue 11/106:50 pm -
2 stops37h 35m
Thu 11/263:20 pm -
1 stop28h 25m
Deal found 10/7![Multiple Airlines logo]()
$817
This United Airlines deal was found by Cheapflights users on 10/7. 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 10/311:00 pm -
2 stops40h 00m
Thu 11/1912:00 pm -
2 stops26h 53m
Deal found 10/7![United Airlines logo]()
$827
This United Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 11/46:50 pm -
1 stop9h 10m
Mon 11/1612:00 pm -
1 stop10h 59m
Deal found 10/7![United Airlines logo]()
$836
This Orbitz deal was found by Cheapflights users on 10/7. 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.
Mon 11/212:00 pm -
2 stops40h 50m
Tue 11/173:30 pm -
2 stops38h 26m
Deal found 10/7![Multiple Airlines logo]()
$843
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 October 8, 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 October 8, 2026.
This FlightHub deal was found by Cheapflights users on 10/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:25 pm -
2 stops21h 55m
Thu 11/511:35 am -
2 stops42h 19m
Deal found 10/3![Scandinavian Airlines logo]()
$768
This United Airlines deal was found by Cheapflights users on 10/3. 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.
Wed 10/286:50 pm -
1 stop10h 10m
Thu 11/512:00 pm -
1 stop17h 24m
Deal found 10/3![United Airlines logo]()
$811
This Finnair deal was found by Cheapflights users on 10/7. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/98:29 am -
2 stops26h 46m
Mon 11/1610:00 am -
2 stops40h 19m
Deal found 10/7![Multiple Airlines logo]()
$852
This Icelandair deal was found by Cheapflights users on 10/5. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/3112:40 pm -
1 stop11h 50m
Mon 1/255:00 pm -
1 stop32h 20m
Deal found 10/5![Multiple Airlines logo]()
$879
This United Airlines deal was found by Cheapflights users on 10/6. 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.
Thu 10/295:55 pm -
2 stops35h 05m
Mon 11/212:00 pm -
2 stops30h 38m
Deal found 10/6![United Airlines logo]()
$916
This Icelandair deal was found by Cheapflights users on 10/8. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:30 pm -
1 stop11h 10m
Tue 10/275:10 pm -
1 stop22h 10m
Deal found 10/8![Multiple Airlines logo]()
$926
This United Airlines deal was found by Cheapflights users on 10/7. 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 11/95:00 pm -
2 stops59h 00m
Mon 11/1612:00 pm -
1 stop13h 23m
Deal found 10/7![United Airlines logo]()
$954
This Icelandair deal was found by Cheapflights users on 10/7. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/106:30 am -
1 stop17h 35m
Thu 11/265:10 pm -
1 stop20h 35m
Deal found 10/7![Multiple Airlines logo]()
$929
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Wed 11/251:08 pm -
1 stop14h 52m
Mon 11/3012:00 pm -
2 stops40h 30m
Deal found 10/4![United Airlines logo]()
$954
This Icelandair deal was found by Cheapflights users on 10/5. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:20 am -
1 stop15h 20m
Fri 10/305:15 pm -
1 stop21h 05m
Deal found 10/5![Multiple Airlines logo]()
$989
Last-minute flights from St. Louis to Keflavik IntlDiscover last-minute flight deals from St. Louis to Keflavik Intl. Data last updated October 8, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Keflavik Intl. Data last updated October 8, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 10/3. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/282:25 pm -
2 stops21h 55m
Thu 11/511:35 am -
2 stops42h 19m
Deal found 10/3![Scandinavian Airlines logo]()
$768
This United Airlines deal was found by Cheapflights users on 10/3. 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.
Wed 10/286:50 pm -
1 stop10h 10m
Thu 11/512:00 pm -
1 stop17h 24m
Deal found 10/3![United Airlines logo]()
$811
This United Airlines deal was found by Cheapflights users on 10/7. 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 10/311:00 pm -
2 stops40h 00m
Thu 11/1912:00 pm -
1 stop15h 40m
Deal found 10/7![United Airlines logo]()
$827
This United Airlines deal was found by Cheapflights users on 10/7. 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 11/18:50 am -
2 stops19h 10m
Thu 11/1912:00 pm -
2 stops15h 52m
Deal found 10/7![United Airlines logo]()
$816
This Scandinavian Airlines deal was found by Cheapflights users on 10/7. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:25 pm -
2 stops38h 25m
Sun 11/156:05 pm -
2 stops35h 51m
Deal found 10/7![Scandinavian Airlines logo]()
$846
This Orbitz deal was found by Cheapflights users on 10/7. 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.
Mon 11/212:00 pm -
2 stops40h 50m
Tue 11/173:30 pm -
2 stops38h 26m
Deal found 10/7![Multiple Airlines logo]()
$843
This United Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 11/46:50 pm -
1 stop9h 10m
Thu 11/1912:00 pm -
1 stop13h 23m
Deal found 10/7![United Airlines logo]()
$786
This United Airlines deal was found by Cheapflights users on 10/7. 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.
Wed 11/46:50 pm -
1 stop9h 10m
Sat 11/1412:00 pm -
1 stop10h 59m
Deal found 10/7![United Airlines logo]()
$836
This Expedia deal was found by Cheapflights users on 10/7. 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.
Tue 11/106:50 pm -
2 stops37h 35m
Thu 11/263:20 pm -
1 stop28h 25m
Deal found 10/7![Multiple Airlines logo]()
$817
This United deal was found by Cheapflights users on 10/7. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/151:08 pm -
1 stop14h 52m
Tue 12/13:20 pm -
1 stop28h 25m
Deal found 10/7![Multiple Airlines logo]()
$788
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 October 8, 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 October 8, 2026.
This United Airlines deal was found by Cheapflights users on 10/5. 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 1/26:09 pm -
2 stops33h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![United Airlines logo]()
$628
This United Airlines deal was found by Cheapflights users on 10/7. 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 10/113:11 pm -
1 stop12h 39m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![United Airlines logo]()
$630
This Kiwi.com deal was found by Cheapflights users on 10/5. 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.
Sat 1/21:51 pm -
3 stops37h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Multiple Airlines logo]()
$632
This Priceline deal was found by Cheapflights users on 10/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/275:27 pm -
2 stops34h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Finnair logo]()
$635
This Kiwi.com deal was found by Cheapflights users on 10/3. 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.
Tue 10/275:27 pm -
3 stops36h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Multiple Airlines logo]()
$661
This Kiwi.com deal was found by Cheapflights users on 10/7. 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 10/115:53 pm -
3 stops57h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/7![Multiple Airlines logo]()
$741
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 October 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $768 (FlightHub) |
One-way from | $628 (United Airlines) |
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 7,457,451 searches. Data last updated October 8, 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 Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Sat 1/2
6:09 pm-10:00 am
2 stops33h 51m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$628
Quickest round-trip
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Sun 10/11
3:11 pm-8:50 am
1 stop12h 39m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$630
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Sat 1/2
1:51 pm-8:55 am
3 stops37h 04m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$632
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Tue 10/27
5:27 pm-9:15 am
2 stops34h 48m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$635
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Tue 10/27
5:27 pm-11:15 am
3 stops36h 48m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$661
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Sun 10/11
5:53 pm-8:20 am
3 stops57h 27m
Reykjavik Keflavik Intl
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$741
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Wed 10/28
2:25 pm-5:20 pm
2 stops21h 55m
Reykjavik Keflavik Intl
Thu 11/5
11:35 am-11:54 pm
2 stops42h 19m
$768
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Wed 10/28
6:50 pm-10:00 am
1 stop10h 10m
Reykjavik Keflavik Intl
Thu 11/5
12:00 pm-11:24 pm
1 stop17h 24m
$811
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Mon 11/9
8:29 am-5:15 pm
2 stops26h 46m
Reykjavik Keflavik Intl
Mon 11/16
10:00 am-8:19 pm
2 stops40h 19m
$852
St. LouisReykjavik
STL Lambert-St Louis - KEF Reykjavik Keflavik Intl
STLKEF
Lambert-St Louis
Thu 12/31
12:40 pm-6:30 am
1 stop11h 50m
Reykjavik Keflavik Intl
Mon 1/25
5:00 pm-7:20 pm
1 stop32h 20m
$879
Showing 1-10 of 16 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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 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 October 8, 2026.
See what other customers who have flown with Delta and United 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.
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
Entertainment
7.8
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.8
Overall
7.8
Reviews
1 / 20
4.0
OkayJennifer,Sep 2026
ORD - LGA
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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Explore flights to Keflavik Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 8, 2026.
St. Louis and Keflavik Intl flights
Browse other St. Louis and Keflavik Intl flight options. Last updated on October 8, 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 October 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from St. Louis to Keflavik Intl
Discover the top 2 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 7,457,451 searches. Data last updated October 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$783 | Average$1,131 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$784 | Average$1,175 | FlexibilityNo cancel fee | On-timeN/A |