SFO - KEF

$257 Find Cheap Flights from San Francisco to Reykjavik-Keflavik Airport

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 10/1. 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

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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Flights Deals

Cheap Flights from San Francisco to Keflavik Intl (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 Keflavik Intl 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

Mon, Oct 6 - Sat, Oct 11
WestJet Logo
12:50 pm - 8:15 amSFO-KEF
12h 25m1 stop
WestJet Logo
9:35 am - 9:24 pmKEF-SFO
18h 49m1 stop
$530WestJet
Find Deal
Wed, Oct 1 - Tue, Oct 7
WestJet Logo
12:50 pm - 8:15 amSFO-KEF
12h 25m1 stop
WestJet Logo
9:35 am - 9:24 pmKEF-SFO
18h 49m1 stop
$536WestJet
Find Deal
Wed, Oct 15 - Sun, Oct 26
Scandinavian Airlines Logo
7:40 pm - 9:30 amSFO-KEF
30h 50m1 stop
Scandinavian Airlines Logo
11:30 am - 3:35 pmKEF-SFO
35h 05m1 stop
$544Scandinavian Airlines
Find Deal
Wed, Oct 15 - Sun, Oct 26
Scandinavian Airlines Logo
7:40 pm - 9:30 amSFO-KEF
30h 50m1 stop
Scandinavian Airlines Logo
11:15 am - 3:35 pmKEF-SFO
35h 20m2 stops
$545Scandinavian Airlines
Find Deal
Sat, Oct 4 - Mon, Oct 20
Delta Logo
10:45 pm - 6:20 amSFO-KEF
24h 35m1 stop
Delta Logo
11:25 am - 1:18 amKEF-SFO
20h 53m1 stop
$553Delta
Find Deal
Sat, Aug 9 - Thu, Aug 21
Air Canada Logo
1:05 pm - 8:15 amSFO-KEF
36h 10m2 stops
Air Canada Logo
9:50 am - 12:20 pmKEF-SFO
33h 30m2 stops
$566Air Canada
Find Deal
Wed, Aug 20 - Tue, Aug 26
Air Canada Logo
8:30 am - 8:15 amSFO-KEF
16h 45m2 stops
Air Canada Logo
9:50 am - 12:20 pmKEF-SFO
33h 30m2 stops
$576Air Canada
Find Deal
Sat, Aug 9 - Fri, Aug 22
United Airlines Logo
11:55 pm - 8:30 amSFO-KEF
25h 35m1 stop
United Airlines Logo
9:30 am - 11:15 amKEF-SFO
32h 45m1 stop
$580United Airlines
Find Deal
Sun, Aug 3 - Wed, Aug 20
United Airlines Logo
12:20 am - 7:00 amSFO-KEF
23h 40m2 stops
United Airlines Logo
9:30 am - 11:35 amKEF-SFO
33h 05m2 stops
$582United Airlines
Find Deal
Thu, Aug 7 - Wed, Aug 20
Delta Logo
6:05 am - 7:00 amSFO-KEF
17h 55m1 stop
Delta Logo
9:30 am - 5:59 pmKEF-SFO
15h 29m1 stop
$626Delta
Find Deal
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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.

Find cheap flights to Reykjavik-Keflavik Airport
Find cheap flights to Reykjavik-Keflavik Airport

Planning a trip from San Francisco to Reykjavik? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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 August, where tickets cost $835 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,313 and $1,090 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 7 weeks before departure. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
High seasonAugust
Cheapest flight$257
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from San Francisco to Reykjavik-Keflavik Airport

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-Keflavik Airport flights

  • Which airline offers environmentally friendly options for flying from San Francisco to Reykjavík?

    By investing in new, fuel-efficient aircraft and putting numerous sustainability programs into place, SAS and Icelandair have been actively working to become more environmentally friendly for flights from San Francisco to Reykjavík.

  • How can I travel to my location from Keflavik International Airport (KEF)?

    From the airport, you can board the “Straetó” bus to travel to Reykjavík and other Icelandic cities. At the airport, taxis are also easily accessible. You can find them right outside the terminal building. This option provides easy access and direct transportation to your location. If having your own vehicle gives you more flexibility, you can rent one from one of the car rental firms located at the airport.

  • Can I upgrade a class for flights from San Francisco to Reykjavík?

    Yes – you can upgrade to a better class on United Airlines, Icelandair, Delta Air Lines, and SAS (Scandinavian Airlines). These airlines enable passengers to upgrade to a higher class, subject to availability, either at the time of booking or closer to the departure date. Additionally, upgrading your ticket to a higher class is possible by using miles or points.

  • Where do flights from San Francisco to Reykjavík's layovers often take place?

    The majority of San Francisco to Reykjavík flights make a stopover at one of the following locations: Copenhagen (CPH) for SAS Airlines, Minneapolis (MSP), New York (JFK) for Delta Air Lines, or Chicago (ORD) for United. If you choose to take a flight with Air Canada, you will make a stop in one of the following cities: Toronto (YYZ), Montreal (YUL), or Vancouver (YVR), and then connect to Reykjavík (KEF).

  • 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 $257 for a one-way ticket and $530 for a round-trip.

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

    Yes

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

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

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from San Francisco to Reykjavik are Delta and KLM. With an average price for the route of $880 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $949 and an overall rating of 7.8.

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

    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-Keflavik Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Reykjavik-Keflavik Airport 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-Keflavik Airport?

    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-Keflavik Airport 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-Keflavik Airport?

    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-Keflavik Airport from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Francisco to Reykjavik Keflavik Intl Airport

  • When you choose to book your flights through Alaska Airlines, which operates from San Francisco International Airport (SFO) as its hub, there are several benefits. You have a great chance of finding a flight that fits conveniently with your travel plans due to the availability of daily flights connecting San Francisco and Reykjavík.
  • Icelandair, United Airlines, Delta Air Lines, and Air Canada provide reservations for passengers with disabilities, particularly those with limited mobility. These airlines offer specialized services to accommodate passengers with impairments, including mobility assistance, priority boarding and disembarking, wheelchair-accessible seating options, and trained staff to assist them during their travel.
  • Airlines such as Icelandair, Delta Air Lines, SAS (Scandinavian Airlines), United Airlines, Alaska Airlines, and Air Canada cater to families traveling with children on flights from San Francisco to Reykjavík. These carriers provide various amenities like children's meals, activity kits, and entertainment options specifically designed to keep young travelers happy and engaged during the journey.
  • There are several airlines that let passengers bring pets on board for flights from San Francisco to Reykjavík, including SAS, Air Canada, Lufthansa United, and Icelandair. Larger animals can be carried in the airplane hold as checked luggage. The pet carrier must be leak-proof and sufficiently ventilated to guarantee the pet's comfort and safety.
  • When traveling from San Francisco to Reykjavík with a considerable amount of luggage, it's recommended to choose an airline with more flexible carry-on baggage policies. For instance, Icelandair permits passengers to carry a personal item and a carry-on bag into the cabin, with a maximum weight limit of 70 lbs. per bag.

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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
8.5Crew
7.1Food
8.1Boarding
7.1Entertainment
7.8Comfort
Airline reviews

Flying on Hawaiian Airlines was good. But, getting a boarding pass was a hassle. I booked what I thought was an Alaska Airlines flight that was actually a Hawaiian Airlines flight. I couldn't check in online. I had to wait for the Hawaiian Airlines counter to open so I could get my boarding pass which was a requirement for me to get in The Club or the Centurion Lounge. (I had no check in luggage so I didn't expect to have to physically check in.) The Alaska Airlines staff blamed the FAA for the problem.

2.0 MediocreDarrilynn, Jun 2025SFO - HNL
Read more Alaska Airlines reviews

Flying on Hawaiian Airlines was good. But, getting a boarding pass was a hassle. I booked what I thought was an Alaska Airlines flight that was actually a Hawaiian Airlines flight. I couldn't check in online. I had to wait for the Hawaiian Airlines counter to open so I could get my boarding pass which was a requirement for me to get in The Club or the Centurion Lounge. (I had no check in luggage so I didn't expect to have to physically check in.) The Alaska Airlines staff blamed the FAA for the problem.

Great, overall. Thicker seat cushion would be nice. My butt hurt the whole flight.

Thicker seat cushion would be nice. My butt hurt the whole flight.

All good! No entertainment on this new plane yet but ok for this short flight. Great on time flight! Thanks

No non-alcoholic drinks available except water and small apple juice cans.

The flight was delayed over two and a half hours thus causing me to miss my best friend’s funeral. All because the flight crew had to get more rest. That was the reason stated. I understand however very unfortunate. Glad everyone is well rested and resting in peace.

All good except both the outbound and return flights were delayed about 1 1/2 hrs.

Not great. My flight was canceled due to a mechanical problem and I could not get rebooked for the same day. I needed to get to my destination yesterday, not today. I was able to book with another airline but it was a layover and ultimately a 1 hour flight took me 12 hours. Normally I like Alaska much more than Southwest, but Southwest came through with a not terrible price for same day.

The plane was late arriving. The Alaska people did a great job of turning it around quickly and getting us off. We took off about 35 minutes after it reached the gate.

I liked the flight attendant named Tyler. He was charismatic and genuine. I like the pilot in my second flight, he was considerate to everyone’s feelings. I liked the people I sat beside. I like the plane size. I like Alaska airlines

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

While the staff was pleasant and helpful, the following observations are for your awareness. There was some delay on the tarmac on take off and landing. The paid lunch/food offerings were limited. Entertainment was only available on WiFi at a cost.

get E+, a must for 5 hours flight if you are tall

Liked fold flat bed. Didn’t like having no window. Didn’t like poor choice of food and being served dinner very late, hours after take off of a 7:40pm flight. Servers not friendly. Food horrible in business class.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

Not only was the flight delayed more than 3 hours but also there was no internet or movies on the flight. It was Flair/Spirit quality of experience at Westjet prices

West Jet flight was cancelled and I was not notified. I found out when I tried to check in on-line. Spent 4 hours on the phone with West Jet and Just Fly trying to figure what happened.

Only issue was checking in took over an hour and was very stressful. It all worked out, but we weren't sure for a while.

I was very frustrated that our first flight from Grand Rapids to Detroit at 6.20AM was cancelled because the captain wasn’t legal to fly. Especially after the fact that we all had already boarded, then had to deplane. I was excited to fly to Korea for the first time with Korean Air for a connecting flight, but had to give that up because of Delta’s mistake. Not only that, but I wasn’t even able to sit with my dad on the longer flight. Our first flight after being changed was also delayed because the captain had to take an uber. The only compensation we got from this giant mess was a $12 airport expense voucher that I didn’t even get to use since we didn’t have enough time between connecting flights.

We didn’t make the flight due to Delta’s check in line moving too slow.

The line at check in was so long and slow that we missed the gate close for our flight. We had to book another flight with a different airline.

The flight was ahead of schedule. A half glass of juice and a cookie is pathetic! No entertainment possibilities. Not even a plug-in for phone or IPad if you wanted to watch a downloaded movie. Back to flying Air Canada!

The flight was ahead of schedule. A half glass of juice and a cookie is pathetic!

The staff were the friendliest I have encountered in years. Absolutely great!

Plane changed to one with no entertainment system or ability to serve hot meals

Easy boarding and comfortable seating were plusses. Enjoyed the experience and good service from the captain and crew. Many thanks...!

Somehow, my booking was under my preferred name instead of my legal name so they almost didn’t let me board the plane at LAX. This problem should have been notified to me when I was still in Toronto.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

Poor air traffic controller staffing led to a 50%reduction on flights so we got to wait 4 hrs for our flight! Very disorganized at the gate Poor communication with customers

No Charging ports for personal electronics, which were required to use wifi entertainment.

They are a great airline, and i enjoying flying with them. However my experience with booking through Kayak was a horrible experience. With all the restrictions and glitches of website. My entire bookings by kayak was wrong. And there was no possible way of fixing anything with them, because they hand over responsibility to the airline after purchase is made. Will not be booking through Kayak again and will inform my family and friends not to as well.

I liked nothing about this flight nor the incredible lack of service and communication on this flight from the Captain to every staff member. Arrogant, entitled and lacking any kind of basic customer service

I booked my flight ni November and was placed on standby? How does this happen. Flight was 1 1/2 hours late departure plane was switched to a smaller plane easy to tell this is a government run company they don’t care about anyone

Plane was old, cabin was small, overhead bins were small, seats really uncomfortable, no seat-back entertainment

Excellent crew, great food despite catering issues. We need more people like this.

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset. If there is option to use another company, I suggest to other people use them.

I had an exit row and so was Comfortable on the long flight.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

No food was served for 7.5 hrs flight. When our flight changed to other airlines due to wether issue, our seats booked with no checked in luggage when I already payed for. We end up to pay 90 euro per suitcase.

The flights were in time and the bags arrived. well done

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