$465 Cheap Flights from St. Louis (STL) to Reykjavik (KEF)

View $465 flight on Tue, Jul 28, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Reykjavik–Keflavik Intl. Airport (KEF)

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Cheap Flights from St. Louis to Reykjavik (STL-KEF)

Prices were available within the past 7 days and start at $465 for one-way flights and $578 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, Jan 14 - Tue, Jan 20
STL
St. Louis
KEF
Reykjavik
$578 Roundtrip, found 4 days ago
$578
Roundtrip
found 4 days ago
Select Air Canada flight, departing Wed, Jan 14 from St. Louis to Reykjavik, returning Tue, Jan 20, priced at $578 found 4 days ago
Air Canada
Wed, Jan 14 - Tue, Jan 20
STL
St. Louis
KEF
Reykjavik
$583 Roundtrip, found 4 days ago
$583
Roundtrip
found 4 days ago
Select Air Canada flight, departing Wed, Jan 14 from St. Louis to Reykjavik, returning Tue, Jan 20, priced at $583 found 4 days ago
Air Canada
Wed, Jan 14 - Tue, Jan 20
STL
St. Louis
KEF
Reykjavik
$585 Roundtrip, found 4 days ago
$585
Roundtrip
found 4 days ago
Select Air Canada flight, departing Wed, Jan 14 from St. Louis to Reykjavik, returning Tue, Jan 20, priced at $585 found 4 days ago
United
Tue, Aug 11 - Thu, Aug 20
STL
St. Louis
KEF
Reykjavik
$587 Roundtrip, found 5 days ago
$587
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 11 from St. Louis to Reykjavik, returning Thu, Aug 20, priced at $587 found 5 days ago
Air Canada
Tue, Aug 11 - Thu, Aug 20
STL
St. Louis
KEF
Reykjavik
$587 Roundtrip, found 5 days ago
$587
Roundtrip
found 5 days ago
Select Air Canada flight, departing Tue, Aug 11 from St. Louis to Reykjavik, returning Thu, Aug 20, priced at $587 found 5 days ago
Air Canada
Tue, Aug 11 - Thu, Aug 20
STL
St. Louis
KEF
Reykjavik
$593 Roundtrip, found 5 days ago
$593
Roundtrip
found 5 days ago
Select Air Canada flight, departing Tue, Aug 11 from St. Louis to Reykjavik, returning Thu, Aug 20, priced at $593 found 5 days ago
United
Tue, Aug 11 - Thu, Aug 20
STL
St. Louis
KEF
Reykjavik
$597 Roundtrip, found 5 days ago
$597
Roundtrip
found 5 days ago
Select United flight, departing Tue, Aug 11 from St. Louis to Reykjavik, returning Thu, Aug 20, priced at $597 found 5 days ago
Lufthansa
Mon, Nov 10 - Tue, Nov 18
STL
St. Louis
KEF
Reykjavik
$624 Roundtrip, found 3 days ago
$624
Roundtrip
found 3 days ago
Select Lufthansa flight, departing Mon, Nov 10 from St. Louis to Reykjavik, returning Tue, Nov 18, priced at $624 found 3 days ago
Virgin Atlantic
Tue, May 12 - Tue, May 19
STL
St. Louis
KEF
Reykjavik
$682 Roundtrip, found 16 hours ago
$682
Roundtrip
found 16 hours ago
Select Virgin Atlantic flight, departing Tue, May 12 from St. Louis to Reykjavik, returning Tue, May 19, priced at $682 found 16 hours ago
British Airways
Tue, May 5 - Tue, May 12
STL
St. Louis
KEF
Reykjavik
$722 Roundtrip, found 20 hours ago
$722
Roundtrip
found 20 hours ago
Select British Airways flight, departing Tue, May 5 from St. Louis to Reykjavik, returning Tue, May 12, priced at $722 found 20 hours ago

Find the cheapest month to fly from St. Louis (STL) to Reykjavik (KEF)

April is typically the cheapest month to fly

From $485 - $1,381 per traveler.

Alternative airports near Reykjavik

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Keflavik Intl. KEF. Cheapest option available. Average driving time to city center is 45 minutes. Flights from $968
KEF
Keflavik Intl.
Cheapest
Average driving time to city center45 min
Flights from $968

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF) cost?
Get a cheap one-way flight from $465 or cheap return flight from $578 from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF)?
Planning your getaway for January can help you save, as it's the cheapest month for flights between STL and KEF. You'll usually find the lowest prices during the off-season.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from STL to KEF. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF)?
You'll need to book a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from STL to KEF?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF)?
To arrive at Keflavik Intl. Airport (KEF) on schedule, choose a flight that takes off from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF) last-minute?
Booking your plane ticket from STL to KEF shortly before your getaway is generally more expensive. But if there's some wiggle room with your schedule, you could grab a cheap last-minute fare.
Is it cheaper to book a STL to KEF flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to KEF flight and hotel package with Expedia could result in significant savings. Better yet, managing everything in one place takes the hassle out of planning your trip. Just secure your flights and select from our wide range of stays, then personalize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Keflavik Intl. Airport (KEF)?
In most cases, you can reschedule or cancel your STL to KEF flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you'd like more details, visit our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Keflavik Intl.
Airlines serving
Air Canada, Air France, Alaska Airlines, American Airlines, British Airways, Delta, KLM, Lufthansa, Scandinavian Airlines, United, Virgin Atlantic
Roundtrip price
$578
Distance
3192 mi

Book with confidence

Book with confidence

St. Louis to Reykjavik Flights

The cheapest times to fly from St. Louis to Reykjavik

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Reykjavik are during the month of January. You can find some of the cheapest flights from St. Louis to Reykjavik with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Reykjavik

Sunday is one of the best days to book for cheap flights from St. Louis to Reykjavik: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Reykjavik

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Reykjavik in 2025. You can also book with separate airlines for your outbound and return journeys, from $465 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Reykjavik flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Reykjavik airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to Reykjavik Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.