SFO - KEF

$247 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 8/26. 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.
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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

 
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.

Recent round-trip flight deals from San Francisco to Reykjavik

KAYAK's recommended round-trip deals from the most popular airlines that fly from San Francisco to Reykjavik.
Discover the best prices for you by selecting your travel dates on KAYAK.
WestJet Logo
12:50 pm - 8:15 amSFO-KEF
12h 25m1 stop
WestJet Logo
9:35 am - 9:25 pmKEF-SFO
18h 50m1 stop
$504WestJet
Find Deal
Sun, Aug 10 - Sat, Aug 23
WestJet Logo
6:05 pm - 8:15 amSFO-KEF
31h 10m1 stop
WestJet Logo
9:35 am - 5:15 pmKEF-SFO
14h 40m1 stop
$521WestJet
Find Deal
Mon, Aug 11 - Fri, Aug 22
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
$615Air Canada
Find Deal
Sun, Aug 10 - Thu, Aug 21
Air Canada Logo
4:35 pm - 8:15 amSFO-KEF
32h 40m2 stops
Air Canada Logo
9:30 am - 3:30 pmKEF-SFO
37h 00m2 stops
$618Air Canada
Find Deal
Sat, Aug 9 - Wed, Aug 20
United Airlines Logo
6:10 am - 8:10 amSFO-KEF
19h 00m2 stops
United Airlines Logo
9:30 am - 11:15 amKEF-SFO
32h 45m1 stop
$650United Airlines
Find Deal
Wed, Aug 13 - Wed, Aug 20
Delta Logo
5:30 am - 6:20 amSFO-KEF
41h 50m2 stops
Delta Logo
9:30 am - 4:19 pmKEF-SFO
13h 49m2 stops
$656Delta
Find Deal
Sat, Aug 9 - Thu, Aug 21
United Airlines Logo
11:55 pm - 8:15 amSFO-KEF
25h 20m2 stops
United Airlines Logo
11:00 am - 8:51 pmKEF-SFO
16h 51m2 stops
$657United Airlines
Find Deal
Tue, Aug 12 - Thu, Aug 21
Scandinavian Airlines Logo
7:40 pm - 7:05 amSFO-KEF
28h 25m2 stops
Scandinavian Airlines Logo
5:10 pm - 4:30 pmKEF-SFO
30h 20m1 stop
$672Scandinavian Airlines
Find Deal
Wed, Oct 1 - Tue, Oct 7
Scandinavian Airlines Logo
7:40 pm - 7:05 amSFO-KEF
28h 25m2 stops
Scandinavian Airlines Logo
5:10 pm - 4:30 pmKEF-SFO
30h 20m1 stop
$693Scandinavian Airlines
Find Deal
Wed, Sep 24 - Tue, Sep 30
Delta Logo
11:45 pm - 9:30 amSFO-KEF
26h 45m2 stops
Delta Logo
9:30 am - 4:19 pmKEF-SFO
13h 49m2 stops
$694Delta
Find Deal
Wed, Aug 13 - Thu, Aug 21
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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’s the cheapest day of the week to fly from San Francisco to Reykjavik-Keflavik Airport?

The average price of all round-trip flights from San Francisco to Reykjavik Keflavik Intl Airport clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from San Francisco to Reykjavik-Keflavik Airport, look for departures on Mondays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Reykjavik-Keflavik Airport, Sunday is the cheapest day to fly and Monday is the most expensive.

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 February, where tickets cost $862 (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 $1,096 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 9 weeks before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low seasonJanuary
High seasonAugust
Cheapest flight$247
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 11% 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 $247 for a one-way ticket and $504 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?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between San Francisco and Reykjavik-Keflavik Airport, with Star Alliance 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, 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 $1,142 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $861 and an overall rating of 8.0.

  • 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.

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.
7.4
United AirlinesOverall score based on 8696 reviews
7.7Boarding
6.6Food
7.1Entertainment
8.1Crew
7.3Comfort
Airline reviews

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. 👍👍

10.0 ExcellentAnonymous, Apr 2025SFO - HKG
Read more United Airlines reviews

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. 👍👍

Compared with other carriers business class for an overnight was not worth the extra expense.

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

AWFUL. I have had the experience of traveling with many airlines across the world, and hands down United Airlines is the worst. Not one flight was on time, and I don’t think I met one crew member or staff member who wasn’t rude.

For an 8.5 hour flight the service on board lacked a bit. Service start was slow, the food was worse than usual and they skipped the snack they were supposed to deliver before landing.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

It was good. Just that the seats could not be reclined. The people behind were not ready to let the chairs be reclined

Checkin was painful and slow! Lady didn’t seem to know what was going on and couldn’t explain the delay. Seemed ahe couldnt see the computer scree and we couldn’t hear her talk through her mask.

Plane left & arrived early- 5 Crew great. Wi fi - paid for 2, only 1 worked - so so. Waste of $. Coolie was good

They cancelled our flight home less than 24 hours before it was supposed to leave. It partially ruined our last day because I was on the phone trying to get 5 people home and the stress that it causes. We still arrived at the airport with no definite flight plans. The actual flight was good but my kids really misses the kids meals I had ordered for them which obviously didn’t make it to the new flight.

Very helpful in getting us off the plane first to make a tight connection.

The seats were really cramped. The high backs on the chairs made you feel claustrophobic.

Boarding was chaotic and the flight left late but arrived at a decent time. This may have been because of the sxsw festival that was going on.

I was pleasantly surprised as it was my first time flying with them. The seats were comfortable with more legroom than usual. The service was great too! The entertainment was good but could use a few more new movies.

The flight got canceled and you just send an email in the middle of the night and no solution to how to get on the next flight or provide other solutions.

You cost me my time and did not compensate properly. Gfy.

Missed a connecting flight and SAS was at fault. I was awarded a $20 voucher in exchange for 8 hours of my time? Gfy.

Seat was lumpier than I’ve ever remembered it to be although comfortable when tilted back. I don’t recall being that hungry after being served food from SAS before. Flight attendant on the second flight to Aalborg seemed to be having a bad day.

Please see my comments for the flight from Chicago to Copenhagen

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

Flight was delayed 3 times. Then cancelled due to pilot being timed out. They refused hotel vouchers. Gate attendants were very rude and could not help you at all.

Terrible. First my return flight was rescheduled to a terrible itinerary. Paid for window seats where there was no window. All of my seats were mediocre or terrible despite paying in advance for them. Zero onboard entertainment- it didn’t work or wasn’t available. If it was available there were zero instructions provided. I also didn’t like being forced to check my carry-on luggage. Delta screwed me around on the way home with a 2 hour flight delay that caused me to miss my connecting flight so my luggage did not come home with me but had to be shipped on a later flight. Just grateful they found it. But Delta attendants lied about the delay - a supervisor at an info booth assured me they would compensate because it was the fault of the pilot arriving over an hour late but when I went to the boarding gate to get help with this they insisted it was a ground problem in Toronto and not Delta’s fault BUT another flight to Toronto was going around the same time with no delays and West Jet agents in Toronto said there was no notice of any ground delays at the airport (which I have on video). When I went back to the info desk to find the Delta supervisor she was gone. I had to run through Toronto airport asking any availabile West Jet staff I could find to book a new flight home as I didn’t have a connecting flight anymore. Baggage wouldn’t help OR give me my bag back. Because we were one of the last flights into the airport all staff had left. I finally decided to go through security to find an agent at a boarding desk and was lucky to catch one before she left to get booked onto the next flight home in the morning but I still had to spend the night in the airport. It was awful!!! I was scared, travelling alone and desperate to find help - which was a extreme challenge. Maybe 2 out of the dozen people I asked were pleasant. The rest difficult. I felt betrayed. Oh and I kept getting directed to the information desk in Toronto airport but no one was on staff and I used the phone to try calling someone but I kept getting useless recording. I will not be flying Delta or West Jet again. It will be a long time before I feel safe to travel again. Many tears. This was an awful and highly stressful experience.

Good. Would be better if the carry on baggage was free.

Lots of delays and a broken plane, would not recommend

Horrible. I checked out myself that it seems that I can have a free carry-on. But they ask me to pay $75 when we are nearly boarding. It was tricky during check out that make you mistake that you can have a carry-on beside your personal item. Also they ask $75 in the airport instead of $35 during checkout. So the whole process is designed to make you this mistake

Westjet is one of the worst airlines in the world. 100% guaranteed to have flight delays and flight cancellations. Will never book again with Westjet.

Westjet is the worst airline. If you fly with them, you can expect 100% delays or flight cancellations. I support all Canadian, but not Westjet. They are terrible at what they do and will avoid them as much as possible.

Plane should have entertainment, instead of people paying to use wifi

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.

1. The PA system was painfully loud. 2. Overhead bin #33 was missing—I find this troubling.

I had a disappointing experience at the San Diego airport with one of your gate agents. Despite being in Zone 4 and traveling with a standard carry-on bag that has never been an issue (30 flights in Q4 alone), the tall, blonde gentleman forced me to gate-check my bag. When I politely asked if we could verify the bag’s size, he became confrontational, even threatening to deny me boarding twice. His behavior appeared erratic and unprofessional, projecting a negative attitude onto passengers, as if he was going through something mentally. Notably, there was ample overhead space once all passengers had boarded. In contrast, the tall, older Asian agent handled the situation with professionalism and calmness, making a clear effort to de-escalate. As an avid traveler, this unnecessary inconvenience set a frustrating tone for my trip to Asia.

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

Only serving 2 small coffee in 7.5 hrs flight with very limited choice to order food.

Booked with Kayak… Economy Class it said. I had filtered for 1 checked bag. Get to boarding and it says I have Economy Light w/ no checked bags. $136 each way for baggage now. Do not use smartfares.com. Very misleading and a terrible start to this trip.

Overall good. I was surprised how easy it was to get from plain to plain in such a short time. Food choices were not so great and quite expensive. Entertainment was ok. Flights were smooth.

Our three ski bags did not arrive and are still not delivered, one full day later. With one ski bag not traceable at all. I would not fly Iceland Air again.

Horrible. The flight was delayed by over 3 hours but updates were barely provided. Boarding started 3 hours late then stopped because their system crashed. So now, passengers were standing for 15 minutes in the open waiting to get boarding passes scanned and get on a bus. Duty-free closed around 4-4:30. Only 1 food outlet was open and it was super slow and busy since it was serving passengers from multiple flights. So a number of passengers couldn't buy meals at the terminal. Since the flight was delayed by over 3 hours, we could have been offered snacks on-board. Nothing. The seats barely reclined. In-flight entertainment options were pitiful. Overall, a miserable experience. Never flying on Icelandair ever again. :(

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