SFO - SJU

$185 Find Cheap Flights from San Francisco to San Juan

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 San Juan 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin Intl Airport

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

Cheapest round-trip
$410
Typical prices: $386-$547
Frontier
Tue 9/22Tue 9/29
SFO - SJU • 1 stop
Cheapest one-way
$185
Typical prices: $220-$337
Frontier
Wed 8/26
SFO - SJU • 1 stop
Top airlines
Cheapest • from $410 (round-trip)
Best reviews • 7.8 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 San Juan. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $305 (round-trip)
Shortest trip • 6h 11m (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 14% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 11% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Juan!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Francisco to San Juan (SFO-SJU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to San Juan 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 San Juan

Tue, Sep 22 - Tue, Sep 29
Frontier Logo
10:48 pm - 3:25 pm
SFO
-
SJU
13h 37m
1 stop
Frontier Logo
4:39 pm - 4:57 pm
SJU
-
SFO
27h 18m
2 stops
$410Frontier
Tue, Aug 18 - Tue, Aug 25
Multiple Airlines Logo
10:35 pm - 2:16 pm
SFO
-
SJU
12h 41m
1 stop
Multiple Airlines Logo
5:00 pm - 11:51 pm
SJU
-
SFO
9h 51m
1 stop
$421Multiple Airlines
Mon, Sep 14 - Sat, Sep 19
Frontier Logo
10:48 pm - 3:25 pm
SFO
-
SJU
13h 37m
1 stop
Frontier Logo
4:39 pm - 6:20 pm
SJU
-
SFO
28h 41m
2 stops
$425Frontier
Tue, Aug 4 - Thu, Aug 13
Frontier Logo
10:10 pm - 2:16 pm
SFO
-
SJU
13h 06m
1 stop
Frontier Logo
5:22 pm - 8:43 am
SJU
-
SFO
18h 21m
2 stops
$427Frontier
Thu, Aug 20 - Sat, Aug 29
Frontier Logo
10:35 pm - 2:16 pm
SFO
-
SJU
12h 41m
1 stop
Frontier Logo
5:37 pm - 6:45 pm
SJU
-
SFO
52h 08m
2 stops
$428Frontier
Tue, Aug 4 - Sun, Aug 9
Frontier Logo
10:10 pm - 2:16 pm
SFO
-
SJU
13h 06m
1 stop
Frontier Logo
7:10 am - 7:13 pm
SJU
-
SFO
39h 03m
2 stops
$430Frontier
Mon, Aug 10 - Wed, Aug 19
Frontier Logo
11:05 pm - 2:16 pm
SFO
-
SJU
12h 11m
1 stop
Frontier Logo
5:37 pm - 12:18 am
SJU
-
SFO
33h 41m
2 stops
$431Frontier
Tue, Jul 28 - Tue, Aug 4
Frontier Logo
10:10 pm - 2:16 pm
SFO
-
SJU
13h 06m
1 stop
Frontier Logo
7:30 am - 11:22 am
SJU
-
SFO
30h 52m
2 stops
$433Frontier
Thu, Sep 24 - Thu, Oct 8
Southwest Logo
10:30 pm - 2:30 pm
SFO
-
SJU
13h 00m
1 stop
Southwest Logo
9:45 pm - 11:10 am
SJU
-
SFO
16h 25m
2 stops
$436Southwest
Sun, Aug 23 - Wed, Aug 26
Multiple Airlines Logo
10:35 pm - 2:16 pm
SFO
-
SJU
12h 41m
1 stop
Multiple Airlines Logo
1:43 pm - 11:51 pm
SJU
-
SFO
13h 08m
1 stop
$441Multiple Airlines
Booking Insights

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

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

How much is a round-trip flight from San Francisco to San Juan Luis Munoz Marin Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to San Juan Luis Munoz Marin Intl Airport departing in September.

What is the cheapest month to fly from San Francisco to San Juan Luis Munoz Marin 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 San Juan Luis Munoz Marin 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 San Juan Luis Munoz Marin Intl Airport is September, where tickets cost $464 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $603 and $584 respectively.

How far in advance should I book a flight from San Francisco to San Juan Luis Munoz Marin 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 San Juan Luis Munoz Marin 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 San Juan Luis Munoz Marin Intl Airport, you should book around 3 weeks before departure, which saves you about 14% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$185
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from San Francisco to San Juan

When to book flights from San Francisco to San Juan

Are your dates flexible? Find out the best times to travel from San Francisco to San Juan 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 San Juan flights

  • What is the cheapest flight from San Francisco to San Juan Luis Munoz Marin Intl Airport?

    In the last 5 days, the lowest price for a flight from San Francisco to San Juan Luis Munoz Marin Intl Airport was $185 for a one-way ticket and $410 for a round-trip.

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

    Yes

  • Which airports will I be using when flying from San Francisco to San Juan?

    On your way to San Juan, you’ll fly out from San Francisco. You’ll be landing at San Juan Luis Munoz Marin Intl.

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

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

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

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

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

    Fort Lauderdale is the most popular layover city among KAYAK users traveling from San Francisco to San Juan.

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

    The two airlines most popular with KAYAK users for flights from San Francisco to San Juan are Southwest and Alaska Airlines. With an average price for the route of $593 and an overall rating of 7.9, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $756 and an overall rating of 7.9.

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

    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 San Juan.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan 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 San Juan?

    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 San Juan with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and SJU 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 San Juan?

    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 San Juan 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 San Juan

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to San Juan. 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 San Juan? 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.
7.8
DeltaOverall score based on 8455 reviews
8.5Crew
7.2Food
7.8Entertainment
7.8Comfort
8.1Boarding
Airline reviews

Flight delayed four separate times. I’m now one hour hours late to landing.

2.0 MediocreTravis, Jun 2026
SFO - LAX
Read more Delta reviews

Flight delayed four separate times. I’m now one hour hours late to landing.

It was good. The leg room was not great in Row 1.

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!

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

When we checked in my friend and I were sitting seperate. By the time we got to boarding, they automatically switched our seats. I really liked that.

I trust Delta. I travel comfortable. The snacks could improve or could go to something as a little sandwich.

No extra snacks were available. Meals quality is terrible. Crew was not friendly.

Lost one piece of luggage even though I checked in 2.5 hours before the flight

It was perfect! United Airlines staff was extremely caring, super friendly and professional

United has maintenance issues and can then never recover. No operations ability and simple issues always turn into multiple hours long cascading delays. Worst airline on earth.

I paid for a confirmed upgraded aisle seat and was moved to a center seat in the back of the plane at the last minute.

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Easy of boarding, helpfully staff at check in, surprisingly comfortable seating

Lost of requested seat assignments. Lost my husband's meal choice

My flight was completely full. Making me very stressful with people walking around all the time. I believe airlines can do better for entertain people during the flight.

The United website was easy to use and had all the information I needed. I needed to change my flight and it was accomplished easily on line. I was also easily able to upgrade and for a reasonable price. Boarding went smoothly and the flight was in time. The service was good in board but the crew did not seem happy at all. Limited availability of meals - not much choice for purchase and in business class they ran out of one of the meal choices by row 4. .

Flight was delayed multiple times without giving any particular reason and the only thing that was communicated was that 'Aircraft is getting ready'. I was stuck at SFO airport for 15 hours and finally took Southwest Airlines flight back home to Dallas.

I was not clear if food was offered or not.

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

Take-off delayed an hour because of a missing flight officer, so,arrived in Charlotte lates causing many passengers to miss connections. Otherwise a very good flight, safe and comfortable, with an excellent professional crew.

Delayed delayed. Poor professionalism. Our seats changed and we pay for them

B-class on an old plane with antiquated amenities and poor service. Landed in Rome w/o bag that didn’t make the connection (plenty of time in London). Bag will come to hotel NOT the day it lands but the following night!! Still waiting for bag…BA had nothing to offer in support and couldn’t even tell me their comp, told to submit receipts and then I’ll learn what is or isn’t covered.

Premium Economy Good crew, good service, excellent food. Seat back screen just not bright enough.

The plane was broken so we had to change planes.

Uncomfortable seats and flight attendant was rude as she insisted on waking up my husband to ask him if he wanted a drink. When he said that he was sleeping, she replied “without an attitude “. He was seated at 8c

Airlines must do something with overweight people... Maybe reserve a business class seat for them, or you could pay the consequences if someone overweight seat side by side to you in economy.

Seats were great, the staff was great, and the food was about the best I've had on a plane, and is especially the best of any US-based carrier I've flown. Free Wi-Fi was also great.

Rude crew member. She seemed annoyed at me without me saying a single word. Also loudly admonished me for having my bag next to my seat instead of tucked away before landing. Just telling me to put it away and guiding me without giving me a lecture would have been enough.

Too many long delays with JetBlue. Worst major airline that serves JFK but unfortunately I keep going back because of the prices.

Little snafu at boarding. Staff communicated with gate poorly. Flight attendant was rude making disembark early. This was an older mint class. Needs an overhaul for sure. Food was good. The male flight attendant was really nice.

at the time for boarding the lady just call Group A and no other goups and everybody from A to F go inside without the right turn,and when we get in theres no more spsce for carry on , the ones that get in at not correct group from the back occupy our space !!!!! a mess !!!!

The boarding and flight were ok, but there were several painful issues. The flight was 3:20 in the air and almost four hours door to door, but they only had snack packs on the plane. They really need to have food on longer flights or make it clear to everyone that they won’t have food. They also advertise free WiFi, but it did not work for 90% of this flight. Again, almost four hours door to door. If I had known I was flying spirit for JetBlue prices then I would have planned differently.

I really liked the way snacks and drinks were available throughout the flight!!! The flight attendants were also all fantastic!

Always like Jet Blue! It seems, however, that people are getting bigger & seats are getting smaller! We had a very full flight and I couldn't get an aisle seat like I always do. I wish there were more leg room. People sitting next to me were very nice though so it was fine to disturb them if I needed to use the restroom. Otherwise the flight was fine but a bit long.

I think the food / snack service was very poor. tehy could have done better. Evrything else was great

No wifi, not even while close to the continental US or Puerto Rico, no entertainment whatsoever (TVs not working). Totally disappointing.

They didn’t offer a water, even after I asked

First of all we hade waited 3 hours in the airplane waiting to leave. Second the return schedule was changed and it messed up my entire vaction. I won't buy never again another flight and recommend to nobody traveling with them.

The worst. They don’t follow procedure for boarding per group. Flight got delayed for no understandably reasons, they changed our destination from PR to Miami, left us inside a plane for more than 8 hours, then cancelled flight in Miami leaving us stranded. Poorly managed re-accommodation for a new flight and overnight stay so I have to spend in a new ticket and my own hotel room to been able to get to my office next day. Lost 2 days of work and as a doctor, patients loosing their appointments. to other flights and besides

I liked the price of the flight and the chance to buy a seat with no person seated in the middle seat.. Also the flight was right on time.

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

The flight left over two hours late. They charged me $180 to bring a carry on. There was an error with the spelling of my name and Frontair agent lied that I would need to pay $200 for her to fix the spelling, and pressured me that if I don't do it quick I would lose the flight. I called back and another agent said it costs $75 to fix. All in all, this company is a complete scam.

I took my first and last flight with FRONTIER. The seats are not able to be reclined so it’s not a very comfortable experience when you take a flight of 3 hours or longer. You must pay for your luggage either carry on or check in, so taking all this in consideration at the end what you think you’re saving your paying in services that should be included. Not a beverage in sight. . You’re seriously better off getting on a proper airline such as Delta, AA, United, etc.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

Frontier notifying me earlier of flight delay of over 2 hours.

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

Information on your arrival and departure airports