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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 1/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from San Francisco to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:20 pm - 3:19 pm
SFO
-
SJU
11h 59m1 stop
Frontier Logo
10:47 pm - 1:18 pm
SJU
-
SFO
18h 31m2 stops
$308Frontier
Mon, Jan 5 - Sun, Jan 11
Multiple Airlines Logo
8:43 am - 11:37 am
SFO
-
SJU
22h 54m2 stops
Multiple Airlines Logo
4:11 pm - 9:39 pm
SJU
-
SFO
33h 28m1 stop
$311Multiple Airlines
Thu, Feb 19 - Tue, Feb 24
Southwest Logo
6:05 am - 8:55 pm
SFO
-
SJU
10h 50m2 stops
Southwest Logo
5:40 am - 1:45 pm
SJU
-
SFO
12h 05m2 stops
$317Southwest
Tue, Jan 27 - Thu, Jan 29
Frontier Logo
10:58 pm - 3:03 pm
SFO
-
SJU
12h 05m1 stop
Frontier Logo
6:00 am - 9:55 pm
SJU
-
SFO
19h 55m2 stops
$318Frontier
Sat, Feb 21 - Sat, Feb 28
Multiple Airlines Logo
11:20 pm - 3:27 pm
SFO
-
SJU
12h 07m1 stop
Multiple Airlines Logo
7:44 pm - 11:41 pm
SJU
-
SFO
31h 57m2 stops
$320Multiple Airlines
Sat, Jan 17 - Fri, Jan 23
Frontier Logo
10:46 pm - 3:02 pm
SFO
-
SJU
12h 16m1 stop
Frontier Logo
4:16 pm - 9:55 pm
SJU
-
SFO
33h 39m1 stop
$322Frontier
Sun, Feb 22 - Fri, Feb 27
Multiple Airlines Logo
11:20 pm - 3:01 pm
SFO
-
SJU
11h 41m1 stop
Multiple Airlines Logo
10:45 am - 11:29 pm
SJU
-
SFO
16h 44m1 stop
$325Multiple Airlines
Thu, Jan 1 - Wed, Jan 14
Frontier Logo
8:48 am - 12:43 am
SFO
-
SJU
35h 55m2 stops
Frontier Logo
4:11 pm - 9:39 pm
SJU
-
SFO
33h 28m1 stop
$328Frontier
Thu, Feb 19 - Thu, Feb 26
Frontier Logo
10:58 pm - 2:35 am
SFO
-
SJU
23h 37m2 stops
Frontier Logo
4:11 pm - 9:39 pm
SJU
-
SFO
33h 28m1 stop
$329Frontier
Wed, Feb 18 - Tue, Mar 3
Multiple Airlines Logo
6:55 am - 12:57 pm
SFO
-
SJU
26h 02m2 stops
Multiple Airlines Logo
7:49 pm - 9:33 am
SJU
-
SFO
17h 44m1 stop
$330Multiple Airlines
Tue, Feb 17 - Thu, Feb 19

American Airlines flights from San Francisco to San Juan

Our best American Airlines deals on San Francisco to San Juan flight tickets
American Airlines
Jan 7
SFO6:00 amSan Francisco
11h 39m
1 stop
SJU9:39 pmSan Juan Luis Munoz Marin Intl
Jan 13
SJU6:00 amSan Juan Luis Munoz Marin Intl
14h 01m
2 stops
SFO4:01 pmSan Francisco
$358
Find similar
American Airlines
Feb 24
SFO6:34 pmSan Francisco
11h 33m
2 stops
SJU10:07 amSan Juan Luis Munoz Marin Intl
Mar 3
SJU7:30 amSan Juan Luis Munoz Marin Intl
13h 35m
1 stop
SFO5:05 pmSan Francisco
$359
Find similar
American Airlines
Jan 7
SFO11:36 pmSan Francisco
17h 14m
1 stop
SJU8:50 pmSan Juan Luis Munoz Marin Intl
Jan 13
SJU6:00 amSan Juan Luis Munoz Marin Intl
14h 01m
2 stops
SFO4:01 pmSan Francisco
$360
Find similar

Frontier flights from San Francisco to San Juan

Our best Frontier deals on San Francisco to San Juan flight tickets
Frontier
Jan 17
SFO11:20 pmSan Francisco
12h 07m
1 stop
SJU3:27 pmSan Juan Luis Munoz Marin Intl
Jan 31
SJU8:00 amSan Juan Luis Munoz Marin Intl
19h 41m
2 stops
SFO11:41 pmSan Francisco
$306
Find similar
Frontier
Jan 5
SFO11:20 pmSan Francisco
11h 59m
1 stop
SJU3:19 pmSan Juan Luis Munoz Marin Intl
Jan 11
SJU10:47 pmSan Juan Luis Munoz Marin Intl
18h 31m
2 stops
SFO1:18 pmSan Francisco
$308
Find similar
Frontier
Jan 18
SFO11:12 pmSan Francisco
12h 15m
1 stop
SJU3:27 pmSan Juan Luis Munoz Marin Intl
Jan 29
SJU8:00 amSan Juan Luis Munoz Marin Intl
20h 28m
2 stops
SFO12:28 amSan Francisco
$322
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 December 18, 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 1/5

11:20 pm-3:19 pm

1 stop11h 59m

San Juan Luis Munoz Marin Intl

Sun 1/11

10:47 pm-1:18 pm

2 stops18h 31m

$308

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Thu 2/19

8:43 am-11:37 am

2 stops22h 54m

San Juan Luis Munoz Marin Intl

Tue 2/24

4:11 pm-9:39 pm

1 stop33h 28m

$311

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 1/27

6:05 am-8:55 pm

2 stops10h 50m

San Juan Luis Munoz Marin Intl

Thu 1/29

5:40 am-1:45 pm

2 stops12h 05m

$317

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 2/21

10:58 pm-3:03 pm

1 stop12h 05m

San Juan Luis Munoz Marin Intl

Sat 2/28

6:00 am-9:55 pm

2 stops19h 55m

$318

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 1/17

11:20 pm-3:27 pm

1 stop12h 07m

San Juan Luis Munoz Marin Intl

Fri 1/23

7:44 pm-11:41 pm

2 stops31h 57m

$320

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sun 2/22

10:46 pm-3:02 pm

1 stop12h 16m

San Juan Luis Munoz Marin Intl

Fri 2/27

4:16 pm-9:55 pm

1 stop33h 39m

$322

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Thu 1/1

11:20 pm-3:01 pm

1 stop11h 41m

San Juan Luis Munoz Marin Intl

Wed 1/14

10:45 am-11:29 pm

1 stop16h 44m

$325

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Thu 2/19

8:48 am-12:43 am

2 stops35h 55m

San Juan Luis Munoz Marin Intl

Thu 2/26

4:11 pm-9:39 pm

1 stop33h 28m

$328

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 2/18

10:58 pm-2:35 am

2 stops23h 37m

San Juan Luis Munoz Marin Intl

Tue 3/3

4:11 pm-9:39 pm

1 stop33h 28m

$329

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 2/17

6:55 am-12:57 pm

2 stops26h 02m

San Juan Luis Munoz Marin Intl

Thu 2/19

7:49 pm-9:33 am

1 stop17h 44m

$330

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 October is your next best option. Flight prices from San Francisco to San Juan during October average around $439.

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 $487 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 $440 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

Fastest flight time

10h 55m

Direct flights

None
The fastest flight from San Francisco to San Juan takes 10h 55m
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 10h 55m.

  • 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
3,081 reviews
Search Frontier flights
DeltaPriceFrom $240Free CancellationRating
7.9
8,009 reviews
Search Delta flights
Sun Country AirPriceFrom $286Free CancellationRating
6.9
333 reviews
Search Sun Country Air flights
JetBluePriceFrom $289Free CancellationRating
7.2
2,897 reviews
Search JetBlue flights
American AirlinesPriceFrom $349Free CancellationRating
7.2
11,055 reviews
Search American Airlines flights
United AirlinesPriceFrom $366Free CancellationRating
7.4
9,093 reviews
Search United Airlines flights
SouthwestPriceFrom $412Free CancellationRating
7.9
4,250 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.

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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