SFO - KEF

$414 Find Cheap Flights from San Francisco to Reykjavik

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Reykjavik departing on 5/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Reykjavik Keflavik Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Reykjavik.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Reykjavik.
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Everything you should know

Cheapest round-trip
$782
Overall average: $898
Icelandair
Wed 9/2Mon 9/21
SFO - KEF • 1 stop
Cheapest one-way
$414
Typical prices: $533-$668
Multiple Airlines
Mon 5/25
SFO - KEF • 2 stops
Top airlines
Cheapest • from $782 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Francisco and Reykjavik. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $714 (round-trip)
Shortest trip • 11h 27m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 23% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Reykjavik!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Reykjavik that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Reykjavik

Wed, Sep 2 - Mon, Sep 21
Icelandair Logo
6:00 am - 8:10 am
SFO
-
KEF
19h 10m
1 stop
Icelandair Logo
7:50 pm - 12:59 am
KEF
-
SFO
36h 09m
1 stop
$782Icelandair
Fri, Jun 12 - Fri, Jun 19
Multiple Airlines Logo
11:48 pm - 8:10 am
SFO
-
KEF
25h 22m
1 stop
Multiple Airlines Logo
5:10 pm - 12:31 am
KEF
-
SFO
14h 21m
1 stop
$783Multiple Airlines
Tue, Jun 2 - Wed, Jun 10
Multiple Airlines Logo
1:20 pm - 8:45 am
SFO
-
KEF
12h 25m
1 stop
Multiple Airlines Logo
8:00 pm - 4:40 pm
KEF
-
SFO
27h 40m
2 stops
$784Multiple Airlines
Sun, Apr 19 - Thu, Apr 23
Scandinavian Airlines Logo
4:45 pm - 10:25 am
SFO
-
KEF
58h 40m
2 stops
Scandinavian Airlines Logo
5:05 pm - 2:40 pm
KEF
-
SFO
28h 35m
1 stop
$785Scandinavian Airlines
Fri, May 8 - Mon, May 18
Multiple Airlines Logo
8:20 pm - 6:25 pm
SFO
-
KEF
39h 05m
2 stops
Multiple Airlines Logo
9:00 am - 4:40 pm
KEF
-
SFO
14h 40m
1 stop
$787Multiple Airlines
Sun, May 17 - Tue, May 26
Icelandair Logo
6:55 am - 8:10 am
SFO
-
KEF
18h 15m
1 stop
Icelandair Logo
7:55 pm - 10:21 am
KEF
-
SFO
21h 26m
1 stop
$788Icelandair
Tue, Sep 1 - Wed, Sep 9
Icelandair Logo
6:00 am - 6:05 am
SFO
-
KEF
17h 05m
1 stop
Icelandair Logo
7:55 pm - 9:47 am
KEF
-
SFO
20h 52m
1 stop
$789Icelandair
Tue, May 12 - Fri, May 22
Multiple Airlines Logo
6:55 am - 6:05 am
SFO
-
KEF
16h 10m
1 stop
Multiple Airlines Logo
4:50 pm - 9:01 am
KEF
-
SFO
23h 11m
1 stop
$790Multiple Airlines
Mon, Jun 1 - Wed, Jun 24
Icelandair Logo
11:59 pm - 6:05 am
SFO
-
KEF
23h 06m
1 stop
Icelandair Logo
7:55 pm - 10:06 am
KEF
-
SFO
21h 11m
1 stop
$791Icelandair
Tue, Jun 9 - Wed, Jun 24
Multiple Airlines Logo
5:44 pm - 2:00 pm
SFO
-
KEF
13h 16m
1 stop
Multiple Airlines Logo
10:40 am - 10:55 pm
KEF
-
SFO
19h 15m
1 stop
$793Multiple Airlines
Booking Insights

KAYAK's insights & trends for San Francisco to Reykjavik flights

Get data-powered insights and trends into flights from San Francisco to Reykjavik to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from San Francisco to Reykjavik Keflavik Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Reykjavik Keflavik Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Reykjavik Keflavik Intl Airport is December, where tickets cost $740 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $1,092 and $1,033 respectively.

How far in advance should I book a flight from San Francisco to Reykjavik Keflavik Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Reykjavik Keflavik Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Francisco to Reykjavik Keflavik Intl Airport, you should book around 3 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$414
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from San Francisco to Reykjavik

When to book flights from San Francisco to Reykjavik

Are your dates flexible? Find out the best times to travel from San Francisco to Reykjavik based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking San Francisco to Reykjavik flights

  • What is the cheapest flight from San Francisco to Reykjavik Keflavik Intl Airport?

    In the last 3 days, the lowest price for a flight from San Francisco to Reykjavik Keflavik Intl Airport was $414 for a one-way ticket and $782 for a round-trip.

  • Do I need a passport to fly between San Francisco and Reykjavik?

    Yes

  • Which aircraft models fly most regularly from San Francisco to Reykjavik?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Francisco to Reykjavik?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between San Francisco and Reykjavik, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to Reykjavik from San Francisco?

    Seattle is the most popular layover city among KAYAK users traveling from San Francisco to Reykjavik.

  • Which is the best airline for flights from San Francisco to Reykjavik, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from San Francisco to Reykjavik are Alaska Airlines and Delta. With an average price for the route of $1,098 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $898 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from San Francisco to Reykjavik?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Reykjavik.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Reykjavik?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Reykjavik from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to Reykjavik?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Reykjavik with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and KEF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Reykjavik?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Reykjavik from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from San Francisco to Reykjavik

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Reykjavik. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Reykjavik? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12096 reviews
7.0Entertainment
7.0Food
7.8Comfort
8.1Boarding
8.5Crew
Airline reviews

Four hour delay. Missed our event. And they offered me $75. Absolutely shameful.

2.0 MediocreEric, Mar 2026
SFO - SAN
Read more Alaska Airlines reviews

Four hour delay. Missed our event. And they offered me $75. Absolutely shameful.

I have been flying commercial for decades. I was in one of the ladder boarding groups, had my bag tagged because they thought there was not going to be enough space for it in the overhead bins. I politely asked one of the attendance if I could try to find a space- she said I could and I did. I then took the bag tag off and gave it to one of the other attendants as I was told to do by the first one. He, in a curt, anal, and disrespectful manner, told me that I needed to take my bag down from the overhead bin and check it. This was a situation I’ve never encountered before. The attendant’s attitude was confrontational and belittling in front of other onlooking passengers as if daring me to challenge him. I am a physician who takes care of patients day in and day out. Not wanting to make a scene, I calmly told him, “do what you need to do.” he took my bag down from the overhead bin, put the back tag back on it, and checked it only to make room for another bag that was also supposed to be technically checked by a following passenger. The same male attendant later came up to me and said “you shouldn’t have showed me the bag tag,” as if conveying that he was just following protocol was a justification for treating me like a kid out of line. I cared about this because it took 15 minutes from my life to then retrieve the bag at baggage claim and it also felt like really poor customer service. I understand the need for protocols. This is also a service industry, and we the passengers are the clients. We should be made to feel welcome and respected and our life in transit made as easy as it can be within reason. This attendant clearly needs to be reminded of that. Of note, an older female fellow passenger sitting next to me agreed with this assessment.

Nice crew, healthy snacks and drinks available. Flight to Seattle was short and comfortable.

had to be rerouted due to a medical emergency onboard. Alaska crew treated the patient with utmost respect and continued to keep the passengers updated the entire way through, which I appreciate. But it took 4 hours from landing until we were able to be airborne again, causing us to not get into SFO until ~2 am. I understand it was a tough situation for everyone, but that was an indecent wait.

I love Alaska! We arrived on the later side without seat assignments only to find the had oversold the flight by 1. The attendants worked extra hard to find a way for our party of 7 to stay together and we made it on the flight! Loved the free WiFi also!

Delay for switching planes. Then delay after delay (mechanical) after boarding so that we were almost 3 hrs late, getting in at 230am. Crew was good.

The he whole flight was very smooth on every aspects.

I paid for wifi and it never worked... it was miserable. I couldn't access my shared files to work on the plane, it didn't work on my phone. I paid for nothing but frustration and continual refreshing, hoping it would work

The stewardess are very nice and pleasant, Someone onboard had a medical attention, and they attended that person non-stop all throughout the flight, and yet, did not forget to serve and help other passengers.

The Alaska Airlines app made it very difficult to find my boarding pass. It was very frustrating to use! The flight itself was flawless.

My recent experience was excellent on Delta! I flew with Delta Comfort and I was really comfortable in my seat. I enjoyed the in-flight service. The flight attendants were so friendly and hospitable. I love the snack on the flight as well. This was my first time flying on Delta and I will definitely consider flying with them again.

My flight was canceled on Sunday. Rebooking took three hours. Had to pay for accommodations another night. New flight was delayed for 5 hours, all that was sent was a 12 dollar food voucher, which doesn’t tell you how to use it. Then when we landed we had to sit on the plane for an hour before we could get off.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

It was nt delta. It was aeromexo. Service was awful. They served a very small drink and NO snack for a 3hr and 35min flight. Then for the first 30 min of the flight is was talk and talk over head interruption the movie/ show i picked to watch.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

it was a very short flight so my expectations were low.

Entertainment kept turning itself off. Gave up on watching a movie.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

The flight crew where really good. Better then the crew from BNE to SFO

No pre boarding kiosk to check in, baggage claim detected luggage didn’t leave the airport, poorly managed recovery of lost luggage, and blame lost tag from conveyor to TSA/security, very poor from TSA/security check to delivery, crucial if compensation will go thru and will likely wait for months unlike United,

Flight was good, crew was excellent. No complaints at all

Delayed 3 times in a row for 4 hours total. Incrementally pushing back the flight claiming gate delays but they eventually changed the actual plane, due to technical issues. This strategy to avoid compensation to passengers is unprofessional.

I didn't think about not having the right app for wifi because my connecting flight was with Westjet and when I took off from Seattle I was thinking I would use my wifi, but realized I couldn't on my Westjet app and I did not have Delta's app downloaded.

Plane seating was uncomfortable, very tight fitting for someone my height, did not recline and overall un enjoyable

Horrible! I spend in airport from 9:30 and till 2 am. My flights and connections was delayed, rebooked and after was delayed, I couldn’t get home! I was stuck! The money I paid it’s to much for what I got! 💩 never again flying with your company! Second time booked with you and second time lots of issues. I rather pay 100$ more but be on schedule and time!

Everything was good except for flight delay, but it was because of the snow storm in the arrival airport.

They lost my bag. Hopefully it will be here tomorrow.

No communication from Kayak or West Jet. Booked extra flights, flights cancelled, no one answers calls. Will be disputing charges.

The trip from LAX to Calgary was aboard a 737-700, which is more than twenty years old. Service was fine, and the food was good, but there was no inflight entertainment, and no WiFi. The flight from Calgary to Vancouver was also delayed more than an hour, due to congestion on the Calgary tarmac. And no food service, but there was in-flight WiFi which made a big difference.

Iceland Air severely damaged a checked bag. Additionally, the gate agent caused issues for many passengers who had standard-sized onboard bags that would have passed inspection by any other airline.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

Delays at check-in, seemed like they were short ground staff at the time and some passengers needed extra processing.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

The Experience Was Torture Spend a few extra dollars and avoid Icelandair at all costs. There is absolutely no refreshments, no food, no drinks. Only water, coffee, tea are free and at only half a tiny cup. Entertainment is limited selection of films, shows and mostly outdated. The seats are smaller than usual, with no cushion, no pillows, no blankets. First time in my life have I witness an airline asking for donations in spare change for a charity. With all the money Icelandair saves by starving the passenger, they can afford to give this charity on their own.

If there was a disclaimer regarding food service or lack thereof, l missed it. If l had known l would have prepared better. Same with transferring at Reykjavik. No information about disembarking via stairs into rain, slush and puddles deep enough to swallow a foot. After being treated to haute cuisine restaurants and warm inviting environment during the flight, the airport is, let’s be kind, disappointing. Plane was comfortable, Airbus, staff were welcoming enough. I would likely try the route again. Maybe have a night and day in Iceland. Maybe not.

They had a 4 hour delay and left my luggage in Iceland and it didn’t arrive in Portland until 11/1

It was too cold in the plane my feet froze

Service was excellent. Food and drinks were very good except for a greasy lump of a donut at the end of the flight that left us both feeling internally disgusted.

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Everything you need to know for your flight from San Francisco to Reykjavik

Information on your arrival and departure airports