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Cheap flights from San Francisco to San Juan from $138

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 7/4. 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

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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.
Multiple Airlines Logo
11:59 pm - 1:32 pm
SFO
-
SJU
10h 33m
1 stop
Multiple Airlines Logo
6:41 pm - 12:23 am
SJU
-
SFO
32h 42m
2 stops
$372Multiple Airlines
Fri, May 8 - Wed, May 13
Frontier Logo
12:52 pm - 12:41 am
SFO
-
SJU
32h 49m
2 stops
Frontier Logo
6:25 am - 11:02 pm
SJU
-
SFO
19h 37m
1 stop
$375Frontier
Sat, May 30 - Wed, Jun 10
Multiple Airlines Logo
11:59 pm - 1:32 pm
SFO
-
SJU
10h 33m
1 stop
Multiple Airlines Logo
3:12 pm - 12:23 am
SJU
-
SFO
36h 11m
2 stops
$376Multiple Airlines
Fri, May 8 - Thu, May 14
Frontier Logo
8:44 pm - 5:12 pm
SFO
-
SJU
17h 28m
1 stop
Frontier Logo
6:16 pm - 10:34 am
SJU
-
SFO
19h 18m
1 stop
$377Frontier
Wed, Jun 3 - Fri, Jun 26
Frontier Logo
8:44 pm - 8:04 am
SFO
-
SJU
32h 20m
1 stop
Frontier Logo
3:03 am - 10:41 am
SJU
-
SFO
10h 38m
1 stop
$378Frontier
Tue, Jun 2 - Sat, Jun 6
Multiple Airlines Logo
11:16 pm - 11:10 pm
SFO
-
SJU
20h 54m
1 stop
Multiple Airlines Logo
2:37 pm - 6:02 pm
SJU
-
SFO
30h 25m
2 stops
$379Multiple Airlines
Fri, May 1 - Fri, May 8
Multiple Airlines Logo
10:38 pm - 5:31 pm
SFO
-
SJU
15h 53m
1 stop
Multiple Airlines Logo
6:30 am - 11:47 am
SJU
-
SFO
32h 17m
2 stops
$380Multiple Airlines
Sat, May 2 - Sat, May 9
Multiple Airlines Logo
11:59 pm - 1:32 pm
SFO
-
SJU
10h 33m
1 stop
Multiple Airlines Logo
6:41 pm - 11:47 am
SJU
-
SFO
20h 06m
2 stops
$381Multiple Airlines
Sat, May 9 - Mon, May 18
Frontier Logo
8:51 pm - 1:16 pm
SFO
-
SJU
13h 25m
1 stop
Frontier Logo
4:05 pm - 10:29 am
SJU
-
SFO
21h 24m
1 stop
$382Frontier
Sun, Aug 9 - Fri, Aug 14
Multiple Airlines Logo
10:38 pm - 5:31 pm
SFO
-
SJU
15h 53m
1 stop
Multiple Airlines Logo
6:09 pm - 12:23 am
SJU
-
SFO
33h 14m
2 stops
$384Multiple Airlines
Sat, May 2 - Fri, May 8

Frontier flights from San Francisco to San Juan

Our best Frontier deals on San Francisco to San Juan flight tickets
Frontier
May 30
SFO12:52 pmSan Francisco
32h 49m
2 stops
SJU12:41 amSan Juan Luis Munoz Marin Intl
Jun 10
SJU6:25 amSan Juan Luis Munoz Marin Intl
19h 37m
1 stop
SFO11:02 pmSan Francisco
$375
Frontier
Jun 3
SFO8:44 pmSan Francisco
17h 28m
1 stop
SJU5:12 pmSan Juan Luis Munoz Marin Intl
Jun 26
SJU6:16 pmSan Juan Luis Munoz Marin Intl
19h 18m
1 stop
SFO10:34 amSan Francisco
$377
Frontier
Jun 2
SFO8:44 pmSan Francisco
32h 20m
1 stop
SJU8:04 amSan Juan Luis Munoz Marin Intl
Jun 6
SJU3:03 amSan Juan Luis Munoz Marin Intl
10h 38m
1 stop
SFO10:41 amSan Francisco
$378

JetBlue flights from San Francisco to San Juan

Our best JetBlue deals on San Francisco to San Juan flight tickets
JetBlue
Apr 27
SFO11:05 pmSan Francisco
12h 24m
1 stop
SJU2:29 pmSan Juan Luis Munoz Marin Intl
May 1
SJU4:30 pmSan Juan Luis Munoz Marin Intl
10h 26m
1 stop
SFO11:56 pmSan Francisco
$454
JetBlue
Apr 27
SFO8:00 amSan Francisco
11h 04m
1 stop
SJU10:04 pmSan Juan Luis Munoz Marin Intl
May 1
SJU12:00 pmSan Juan Luis Munoz Marin Intl
14h 55m
1 stop
SFO11:55 pmSan Francisco
$489
JetBlue
Apr 23
SFO8:00 amSan Francisco
9h 49m
1 stop
SJU8:49 pmSan Juan Luis Munoz Marin Intl
Apr 26
SJU4:10 pmSan Juan Luis Munoz Marin Intl
10h 46m
1 stop
SFO11:56 pmSan Francisco
$501

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 April 13, 2026.
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

Cheapest round-trip

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 5/8

11:59 pm-1:32 pm

1 stop10h 33m

San Juan Luis Munoz Marin Intl

Wed 5/13

6:41 pm-12:23 am

2 stops32h 42m

$372

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 5/30

12:52 pm-12:41 am

2 stops32h 49m

San Juan Luis Munoz Marin Intl

Wed 6/10

6:25 am-11:02 pm

1 stop19h 37m

$375

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 5/8

11:59 pm-1:32 pm

1 stop10h 33m

San Juan Luis Munoz Marin Intl

Thu 5/14

3:12 pm-12:23 am

2 stops36h 11m

$376

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 6/3

8:44 pm-5:12 pm

1 stop17h 28m

San Juan Luis Munoz Marin Intl

Fri 6/26

6:16 pm-10:34 am

1 stop19h 18m

$377

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 6/2

8:44 pm-8:04 am

1 stop32h 20m

San Juan Luis Munoz Marin Intl

Sat 6/6

3:03 am-10:41 am

1 stop10h 38m

$378

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 5/1

11:16 pm-11:10 pm

1 stop20h 54m

San Juan Luis Munoz Marin Intl

Fri 5/8

2:37 pm-6:02 pm

2 stops30h 25m

$379

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 5/2

10:38 pm-5:31 pm

1 stop15h 53m

San Juan Luis Munoz Marin Intl

Sat 5/9

6:30 am-11:47 am

2 stops32h 17m

$380
Quickest round-trip

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 5/9

11:59 pm-1:32 pm

1 stop10h 33m

San Juan Luis Munoz Marin Intl

Mon 5/18

6:41 pm-11:47 am

2 stops20h 06m

$381

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sun 8/9

8:51 pm-1:16 pm

1 stop13h 25m

San Juan Luis Munoz Marin Intl

Fri 8/14

4:05 pm-10:29 am

1 stop21h 24m

$382

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 5/2

10:38 pm-5:31 pm

1 stop15h 53m

San Juan Luis Munoz Marin Intl

Fri 5/8

6:09 pm-12:23 am

2 stops33h 14m

$384

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 typical price of a round-trip flight between San Francisco and San Juan?

What is the cheapest month to fly to San Juan?

If you’re not able to fly to San Juan in May, then September is your next best option. Flight prices from San Francisco to San Juan during September average around $442.

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 $499 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 $424 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

9h 38m

Direct flights

None
The fastest flight from San Francisco to San Juan takes 9h 38m
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

Frequently asked questions about flying from San Francisco to San Juan

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

    San Francisco and San Juan are 3618.4 mi apart from one another. In terms of flight time, this usually takes a little over 9h 38m.

  • 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 $135Free CancellationRating
5.7
2,994 reviews
Search Frontier flights
DeltaPriceFrom $172Free CancellationRating
7.9
8,407 reviews
Search Delta flights
Sun Country AirPriceFrom $222Free CancellationRating
6.8
336 reviews
Search Sun Country Air flights
JetBluePriceFrom $273Free CancellationRating
7.2
2,931 reviews
Search JetBlue flights
Alaska AirlinesPriceFrom $329Free CancellationRating
7.9
12,230 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $358Free CancellationRating
7.4
9,581 reviews
Search United Airlines flights
American AirlinesPriceFrom $359Free CancellationRating
7.1
11,568 reviews
Search American Airlines flights
SouthwestPriceFrom $412Free CancellationRating
8.0
4,329 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