Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from San Francisco to San Juan from $178

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Francisco to San Juan departing on 1/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from San Francisco to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
JetBlue Logo
9:44 pm - 10:23 pmSFO-SJU
20h 39m1 stop
JetBlue Logo
4:26 pm - 11:33 pmSJU-SFO
11h 07m1 stop
$374JetBlue
Find Deal
Mon, Dec 8 - Thu, Dec 11
JetBlue Logo
7:45 am - 10:23 pmSFO-SJU
10h 38m1 stop
JetBlue Logo
1:10 pm - 11:30 pmSJU-SFO
14h 20m1 stop
$376JetBlue
Find Deal
Wed, Dec 10 - Thu, Dec 18
American Airlines Logo
6:30 am - 11:52 pmSFO-SJU
13h 22m1 stop
American Airlines Logo
7:00 am - 4:19 pmSJU-SFO
13h 19m2 stops
$379American Airlines
Find Deal
Wed, Dec 10 - Tue, Jan 13
Multiple Airlines Logo
6:24 am - 1:24 amSFO-SJU
39h 00m2 stops
Multiple Airlines Logo
10:59 am - 1:18 pmSJU-SFO
30h 19m1 stop
$380Multiple Airlines
Find Deal
Tue, Dec 30 - Thu, Jan 8
Frontier Logo
11:33 pm - 3:21 pmSFO-SJU
11h 48m1 stop
Frontier Logo
9:15 am - 12:24 amSJU-SFO
19h 09m2 stops
$381Frontier
Find Deal
Fri, Dec 5 - Fri, Dec 12
Frontier Logo
11:33 pm - 3:11 pmSFO-SJU
11h 38m1 stop
Frontier Logo
9:15 am - 12:24 amSJU-SFO
19h 09m2 stops
$384Frontier
Find Deal
Sun, Dec 7 - Sat, Dec 13
Delta Logo
7:15 am - 11:20 pmSFO-SJU
12h 05m1 stop
Delta Logo
7:00 am - 6:16 pmSJU-SFO
15h 16m1 stop
$389Delta
Find Deal
Sun, Dec 7 - Thu, Dec 11
Delta Logo
12:30 am - 3:50 pmSFO-SJU
11h 20m1 stop
Delta Logo
7:00 am - 2:47 pmSJU-SFO
11h 47m1 stop
$394Delta
Find Deal
Fri, Nov 14 - Thu, Dec 18
American Airlines Logo
6:00 am - 11:59 pmSFO-SJU
14h 59m1 stop
American Airlines Logo
6:00 am - 1:29 pmSJU-SFO
11h 29m2 stops
$402American Airlines
Find Deal
Fri, Oct 31 - Wed, Nov 12
United Airlines Logo
8:25 am - 10:22 pmSFO-SJU
9h 57m1 stop
United Airlines Logo
2:05 am - 10:23 amSJU-SFO
12h 18m1 stop
$426United Airlines
Find Deal
Wed, Jan 21 - Sat, Jan 24

Frontier flights from San Francisco to San Juan

Our best Frontier deals on San Francisco to San Juan flight tickets
Frontier
Dec 5
SFO11:33 pmSan Francisco
11h 48m
1 stop
SJU3:21 pmSan Juan Luis Munoz Marin Intl
Dec 12
SJU9:15 amSan Juan Luis Munoz Marin Intl
19h 09m
2 stops
SFO12:24 amSan Francisco
$381
Find similar
Frontier
Dec 7
SFO11:33 pmSan Francisco
11h 38m
1 stop
SJU3:11 pmSan Juan Luis Munoz Marin Intl
Dec 13
SJU9:15 amSan Juan Luis Munoz Marin Intl
19h 09m
2 stops
SFO12:24 amSan Francisco
$384
Find similar
Frontier
Oct 27
SFO10:17 pmSan Francisco
40h 37m
2 stops
SJU5:54 pmSan Juan Luis Munoz Marin Intl
Nov 6
SJU4:31 pmSan Juan Luis Munoz Marin Intl
32h 40m
1 stop
SFO9:11 pmSan Francisco
$387
Find similar

Delta flights from San Francisco to San Juan

Our best Delta deals on San Francisco to San Juan flight tickets
Delta
Dec 7
SFO7:15 amSan Francisco
12h 05m
1 stop
SJU11:20 pmSan Juan Luis Munoz Marin Intl
Dec 11
SJU7:00 amSan Juan Luis Munoz Marin Intl
15h 16m
1 stop
SFO6:16 pmSan Francisco
$389
Find similar
Delta
Nov 14
SFO12:30 amSan Francisco
11h 20m
1 stop
SJU3:50 pmSan Juan Luis Munoz Marin Intl
Dec 18
SJU7:00 amSan Juan Luis Munoz Marin Intl
11h 47m
1 stop
SFO2:47 pmSan Francisco
$394
Find similar
Delta
Nov 1
SFO6:10 amSan Francisco
12h 49m
1 stop
SJU9:59 pmSan Juan Luis Munoz Marin Intl
Nov 11
SJU3:32 pmSan Juan Luis Munoz Marin Intl
12h 41m
1 stop
SFO12:13 amSan Francisco
$412
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Francisco to San Juan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 23, 2025.
Use the filters below to find and compare flights from San Francisco to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 12/8

9:44 pm-10:23 pm

1 stop20h 39m

San Juan Luis Munoz Marin Intl

Thu 12/11

4:26 pm-11:33 pm

1 stop11h 07m

$374

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 12/10

7:45 am-10:23 pm

1 stop10h 38m

San Juan Luis Munoz Marin Intl

Thu 12/18

1:10 pm-11:30 pm

1 stop14h 20m

$376

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 12/10

6:30 am-11:52 pm

1 stop13h 22m

San Juan Luis Munoz Marin Intl

Tue 1/13

7:00 am-4:19 pm

2 stops13h 19m

$379

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 12/30

6:24 am-1:24 am

2 stops39h 00m

San Juan Luis Munoz Marin Intl

Thu 1/8

10:59 am-1:18 pm

1 stop30h 19m

$380

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 12/5

11:33 pm-3:21 pm

1 stop11h 48m

San Juan Luis Munoz Marin Intl

Fri 12/12

9:15 am-12:24 am

2 stops19h 09m

$381

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sun 12/7

11:33 pm-3:11 pm

1 stop11h 38m

San Juan Luis Munoz Marin Intl

Sat 12/13

9:15 am-12:24 am

2 stops19h 09m

$384

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sun 12/7

7:15 am-11:20 pm

1 stop12h 05m

San Juan Luis Munoz Marin Intl

Thu 12/11

7:00 am-6:16 pm

1 stop15h 16m

$389

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 11/14

12:30 am-3:50 pm

1 stop11h 20m

San Juan Luis Munoz Marin Intl

Thu 12/18

7:00 am-2:47 pm

1 stop11h 47m

$394

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 10/31

6:00 am-11:59 pm

1 stop14h 59m

San Juan Luis Munoz Marin Intl

Wed 11/12

6:00 am-1:29 pm

2 stops11h 29m

$402

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 1/21

8:25 am-10:22 pm

1 stop9h 57m

San Juan Luis Munoz Marin Intl

Sat 1/24

2:05 am-10:23 am

1 stop12h 18m

$426

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to San Juan from

How to get the cheapest flight ticket from San Francisco to San Juan

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Juan?

If you’re not able to fly to San Juan in May, then January is your next best option. Flight prices from San Francisco to San Juan during January average around $440.

What is the cheapest day to depart on your flight to San Juan?

The cheapest day to depart from San Francisco to San Juan is on a Tuesday when prices can be found for as low as $456. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $573.

What is the cheapest time of day to depart on your flight to San Juan?

The cheapest time of day to fly to San Juan is at noon when flights can be purchased for as low as $377. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $549 on average. Flights to San Juan from San Francisco in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to San Juan?

You are more likely to see cheaper flights to San Juan from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around $502 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from San Francisco for as low as $443 on momondo.

Cheap San Francisco to San Juan flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Francisco to San Juan

Direct flights

None
There are no direct flights from San Francisco to San Juan. There are no popular flight routes from San Francisco to San Juan.
Search flight deals

  • How far is San Francisco to San Juan by plane?

    San Francisco and San Juan are 3619.0 mi apart from one another. In terms of flight time, this usually takes a little over 9h 51m.

  • When did momondo last update prices for flights from San Francisco Airport to San Juan?

    Prices for flights from San Francisco Airport to San Juan are refreshed on a daily basis.

  • How many operators does momondo search for flights from San Francisco Airport to San Juan?

  • How old do you have to be to fly from San Francisco Airport to San Juan?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from San Francisco Airport to San Juan.

  • What documentation or ID do you need to fly to San Juan?

    The travel and health documents required for your trip to San Juan can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Juan. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from San Francisco to San Juan

Compare and see reviews for airlines that fly from San Francisco to San Juan with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $160Free CancellationRating
5.8
3,128 reviews
Search Frontier flights
DeltaPriceFrom $240Free CancellationRating
7.9
7,981 reviews
Search Delta flights
Sun Country AirPriceFrom $310Free CancellationRating
6.9
334 reviews
Search Sun Country Air flights
JetBluePriceFrom $313Free CancellationRating
7.2
2,908 reviews
Search JetBlue flights
American AirlinesPriceFrom $349Free CancellationRating
7.2
11,028 reviews
Search American Airlines flights
United AirlinesPriceFrom $362Free CancellationRating
7.4
8,991 reviews
Search United Airlines flights
SouthwestPriceFrom $412Free CancellationRating
8.0
4,235 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from San Francisco to San Juan?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Francisco to San Juan for you.

Can I find flights from San Francisco to San Juan with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to San Juan from San Francisco with this policy.

How can momondo help me find flights from San Francisco to San Juan?

momondo helps you find the best flight between San Francisco and San Juan by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from San Francisco to San Juan right now. Can momondo alert me if prices change?

Yes. momondo can track prices for San Francisco to San Juan flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your San Juan trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 11/22
Sat 11/29
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Puerto Rico

Fly into one of these airports located in San Juan

Airports listed have a maximum distance of 7.1 mi from San Juan
San Juan Isla Grande Airport
San Juan Luis Munoz Marin Intl Airport