$247 Cheap Flights from San Francisco (SFO) to Reykjavik (KEF)

View $247 flight on Wed, Aug 20, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from San Francisco to Reykjavik (SFO-KEF)

Prices were available within the past 7 days and start at $247 for one-way flights and $539 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

WestJet
Wed, Aug 20 - Wed, Aug 27
SFO
San Francisco
KEF
Reykjavik
$539 Roundtrip, just found
$539
Roundtrip
just found
Select WestJet flight, departing Wed, Aug 20 from San Francisco to Reykjavik, returning Wed, Aug 27, priced at $539 just found
WestJet
Wed, Jul 16 - Wed, Jul 23
SFO
San Francisco
KEF
Reykjavik
$555 Roundtrip, found 1 day ago
$555
Roundtrip
found 1 day ago
Select WestJet flight, departing Wed, Jul 16 from San Francisco to Reykjavik, returning Wed, Jul 23, priced at $555 found 1 day ago
WestJet
Sat, Jul 5 - Thu, Jul 24
SFO
San Francisco
KEF
Reykjavik
$564 Roundtrip, found 22 hours ago
$564
Roundtrip
found 22 hours ago
Select WestJet flight, departing Sat, Jul 5 from San Francisco to Reykjavik, returning Thu, Jul 24, priced at $564 found 22 hours ago
WestJet
Wed, Aug 20 - Wed, Aug 27
SFO
San Francisco
KEF
Reykjavik
$564 Roundtrip, just found
$564
Roundtrip
just found
Select WestJet flight, departing Wed, Aug 20 from San Francisco to Reykjavik, returning Wed, Aug 27, priced at $564 just found
WestJet
Thu, Jul 17 - Sat, Jul 26
SFO
San Francisco
KEF
Reykjavik
$589 Roundtrip, found 22 hours ago
$589
Roundtrip
found 22 hours ago
Select WestJet flight, departing Thu, Jul 17 from San Francisco to Reykjavik, returning Sat, Jul 26, priced at $589 found 22 hours ago
United
Wed, Aug 20 - Tue, Aug 26
SFO
San Francisco
KEF
Reykjavik
$635 Roundtrip, found 3 hours ago
$635
Roundtrip
found 3 hours ago
Select United flight, departing Wed, Aug 20 from San Francisco to Reykjavik, returning Tue, Aug 26, priced at $635 found 3 hours ago
Virgin Atlantic
Mon, Aug 4 - Fri, Aug 22
SFO
San Francisco
KEF
Reykjavik
$639 Roundtrip, found 4 days ago
$639
Roundtrip
found 4 days ago
Select Virgin Atlantic flight, departing Mon, Aug 4 from San Francisco to Reykjavik, returning Fri, Aug 22, priced at $639 found 4 days ago
Delta
Wed, Jul 30 - Thu, Aug 21
SFO
San Francisco
KEF
Reykjavik
$639 Roundtrip, found 2 days ago
$639
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Jul 30 from San Francisco to Reykjavik, returning Thu, Aug 21, priced at $639 found 2 days ago
American Airlines
Mon, Jan 12 - Mon, Jan 19
SFO
San Francisco
KEF
Reykjavik
$643 Roundtrip, just found
$643
Roundtrip
just found
Select American Airlines flight, departing Mon, Jan 12 from San Francisco to Reykjavik, returning Mon, Jan 19, priced at $643 just found
British Airways
Wed, Nov 5 - Thu, Nov 13
SFO
San Francisco
KEF
Reykjavik
$644 Roundtrip, found 23 hours ago
$644
Roundtrip
found 23 hours ago
Select British Airways flight, departing Wed, Nov 5 from San Francisco to Reykjavik, returning Thu, Nov 13, priced at $644 found 23 hours ago
Flights from San Francisco (SFO) to Reykjavik (KEF)
Origin airport
San Francisco Intl.
Destination airport
Keflavik Intl.
Airlines serving
Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic, WestJet
Roundtrip price
$539
Distance
4192 mi

San Francisco to Reykjavik Flights

The cheapest times to fly from San Francisco 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 San Francisco to Reykjavik are during the month of August. You can find some of the cheapest flights from San Francisco to Reykjavik with Expedia's search tool and vast selection of airlines.

The best time to book a flight from San Francisco to Reykjavik

Sunday is one of the best days to book for cheap flights from San Francisco 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 San Francisco 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 San Francisco to Reykjavik in 2025. You can also book with separate airlines for your outbound and return journeys, from $247 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 San Francisco 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 San Francisco 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.

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Keflavik Intl. Airport (KEF) cost?
Discover the latest flight deals from SFO to KEF by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SFO to KEF?
The cheapest flights from SFO to KEF are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SFO to KEF?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SFO to KEF. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from San Francisco Intl. Airport (SFO) to Keflavik Intl. Airport (KEF)?
You’ll need to catch a flight with a layover when traveling from San Francisco Intl. Airport (SFO) to Keflavik Intl. Airport (KEF). There are no daily direct flights on this route. However, just filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from SFO to KEF?
You’ll typically find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What airline has the least delays from SFO to KEF?
Consider booking with Icelandair if you’d like to go straight from San Francisco Intl. Airport (SFO) to Keflavik Intl. Airport (KEF) without any holdups. This airline has the strongest track record for punctuality, with an on-time score of 82%. Want to get notified of any changes? You can check your flight status using the Expedia App.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Keflavik Intl. Airport (KEF)?
To arrive at Keflavik Intl. Airport (KEF) on schedule, book a flight that leaves from San Francisco Intl. Airport (SFO) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 San Francisco Intl. Airport (SFO) to Keflavik Intl. Airport (KEF) last-minute?
Waiting until just before your departure to book a flight from SFO to KEF generally means paying more. While you may find some last-minute discounts, there’s no guarantee. Be flexible with your travel plans for a better chance of scoring a bargain.
Is it cheaper to book a SFO to KEF flight and hotel package?
Booking a SFO to KEF flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Pick from our extensive range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Keflavik Intl. Airport (KEF)?
It’s usually possible to cancel or reschedule your SFO to KEF flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and if any costs are involved. You’ll also find further details on our Customer Service portal.

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*Available to One Key members.