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Cheap flights from Boston to San Juan from $99

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to San Juan departing on 12/8. 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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Cheap round-trip flights

Spirit Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Spirit Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$176Spirit Airlines
Find Deal
Tue, Feb 3 - Tue, Feb 10
Spirit Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Spirit Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$184Spirit Airlines
Find Deal
Sat, Jan 31 - Sat, Feb 7
Spirit Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Spirit Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$185Spirit Airlines
Find Deal
Wed, Feb 4 - Tue, Feb 10
Spirit Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Spirit Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$187Spirit Airlines
Find Deal
Wed, Feb 4 - Sat, Feb 7
Spirit Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Spirit Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$193Spirit Airlines
Find Deal
Sat, Jan 31 - Wed, Feb 11
Multiple Airlines Logo
6:00 am - 3:06 pmBOS-SJU
8h 06m1 stop
Multiple Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$220Multiple Airlines
Find Deal
Sun, Jan 25 - Sat, Jan 31
Frontier Logo
10:53 am - 9:56 amBOS-SJU
23h 03m2 stops
Frontier Logo
12:28 am - 8:43 amSJU-BOS
8h 15m1 stop
$227Frontier
Find Deal
Fri, Oct 3 - Sat, Oct 4
Frontier Logo
10:53 am - 9:56 amBOS-SJU
23h 03m2 stops
Frontier Logo
12:28 am - 8:43 amSJU-BOS
8h 15m1 stop
$233Frontier
Find Deal
Mon, Sep 29 - Wed, Oct 1
Frontier Logo
9:39 am - 12:41 amBOS-SJU
14h 02m1 stop
Frontier Logo
2:11 am - 8:44 amSJU-BOS
7h 33m1 stop
$242Frontier
Find Deal
Thu, Nov 13 - Sat, Nov 15
Frontier Logo
8:31 am - 12:42 amBOS-SJU
16h 11m1 stop
Frontier Logo
1:26 pm - 8:44 amSJU-BOS
19h 18m1 stop
$249Frontier
Find Deal
Sun, Oct 26 - Wed, Oct 29

Frontier flights from Boston to San Juan

Our best Frontier deals on Boston to San Juan flight tickets
Frontier
Oct 3
BOS10:53 amBoston Logan Intl
23h 03m
2 stops
SJU9:56 amSan Juan Luis Munoz Marin Intl
Oct 4
SJU12:28 amSan Juan Luis Munoz Marin Intl
8h 15m
1 stop
BOS8:43 amBoston Logan Intl
$227
Find similar
Frontier
Sep 25
BOS10:13 amBoston Logan Intl
29h 09m
1 stop
SJU3:22 pmSan Juan Luis Munoz Marin Intl
Sep 27
SJU12:28 amSan Juan Luis Munoz Marin Intl
8h 15m
1 stop
BOS8:43 amBoston Logan Intl
$231
Find similar
Frontier
Sep 29
BOS10:53 amBoston Logan Intl
23h 03m
2 stops
SJU9:56 amSan Juan Luis Munoz Marin Intl
Oct 1
SJU12:28 amSan Juan Luis Munoz Marin Intl
8h 15m
1 stop
BOS8:43 amBoston Logan Intl
$233
Find similar

Spirit Airlines flights from Boston to San Juan

Our best Spirit Airlines deals on Boston to San Juan flight tickets
Spirit Airlines
Feb 3
BOS11:13 amBoston Logan Intl
3h 54m
SJU4:07 pmSan Juan Luis Munoz Marin Intl
Feb 10
SJU5:27 pmSan Juan Luis Munoz Marin Intl
4h 07m
BOS8:34 pmBoston Logan Intl
$176
Find similar
Spirit Airlines
Jan 31
BOS11:13 amBoston Logan Intl
3h 54m
SJU4:07 pmSan Juan Luis Munoz Marin Intl
Feb 7
SJU5:27 pmSan Juan Luis Munoz Marin Intl
4h 07m
BOS8:34 pmBoston Logan Intl
$184
Find similar
Spirit Airlines
Feb 4
BOS11:13 amBoston Logan Intl
3h 54m
SJU4:07 pmSan Juan Luis Munoz Marin Intl
Feb 10
SJU5:27 pmSan Juan Luis Munoz Marin Intl
4h 07m
BOS8:34 pmBoston Logan Intl
$185
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Boston 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 September 16, 2025.
Use the filters below to find and compare flights from Boston to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Tue 2/3

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Tue 2/10

5:27 pm-8:34 pm

Nonstop4h 07m

$176

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 1/31

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Sat 2/7

5:27 pm-8:34 pm

Nonstop4h 07m

$184

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 2/4

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Tue 2/10

5:27 pm-8:34 pm

Nonstop4h 07m

$185

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Wed 2/4

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Sat 2/7

5:27 pm-8:34 pm

Nonstop4h 07m

$187

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sat 1/31

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Wed 2/11

5:27 pm-8:34 pm

Nonstop4h 07m

$193

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 1/25

6:00 am-3:06 pm

1 stop8h 06m

San Juan Luis Munoz Marin Intl

Sat 1/31

5:27 pm-8:34 pm

Nonstop4h 07m

$220

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Fri 10/3

10:53 am-9:56 am

2 stops23h 03m

San Juan Luis Munoz Marin Intl

Sat 10/4

12:28 am-8:43 am

1 stop8h 15m

$227

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Mon 9/29

10:53 am-9:56 am

2 stops23h 03m

San Juan Luis Munoz Marin Intl

Wed 10/1

12:28 am-8:43 am

1 stop8h 15m

$233

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Thu 11/13

9:39 am-12:41 am

1 stop14h 02m

San Juan Luis Munoz Marin Intl

Sat 11/15

2:11 am-8:44 am

1 stop7h 33m

$242

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

Sun 10/26

8:31 am-12:42 am

1 stop16h 11m

San Juan Luis Munoz Marin Intl

Wed 10/29

1:26 pm-8:44 am

1 stop19h 18m

$249

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 Boston 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 October, then January is your next best option. Flight prices from Boston to San Juan during January average around $228.

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

The cheapest day to depart from Boston to San Juan is on a Monday when prices can be found for as low as $291. The most expensive day to fly to San Juan is Saturday, with ticket prices averaging around $336.

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 in the morning when flights can be purchased for as low as $306. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $341 on average. Flights to San Juan from Boston in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Boston Logan Intl to San Juan flight route?

Fly from Boston Logan Intl to San Juan Luis Munoz Marin Intl for the best Boston Logan Intl - San Juan flight prices

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

You are more likely to see cheaper flights to San Juan from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around $289 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from Boston for as low as $241 on momondo.

What cabin class options are available on Boston Logan Intl to San Juan flights?

There are 4 cabin classes available to choose from on Boston Logan Intl to San Juan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Boston to San Juan flight deals and tips

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

Fastest flight time

3h 48m

Direct flights

Every day

Airports in San Juan

1 airport
The fastest flight from Boston to San Juan takes 3h 48m
Direct flights go from Boston to San Juan every day.
There is 1 airport near San Juan: San Juan Luis Munoz Marin Intl (SJU)
Search flight deals

  • How far is Boston Logan Intl to San Juan by plane?

    San Juan is 1675.2 mi away from Boston Logan Intl. By plane, this route typically takes 3h 54m.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to San Juan?

    Prices for flights from Boston Logan Intl Airport to San Juan were last updated today.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to San Juan?

  • How old do you have to be to fly from Boston Logan Intl Airport to San Juan?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boston Logan Intl 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 Boston to San Juan

Compare and see reviews for airlines that fly from Boston to San Juan with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $59Free CancellationRating
5.8
3,174 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $99Free CancellationRating
6.3
8,019 reviews
Search Spirit Airlines flights
DeltaPriceFrom $142Free CancellationRating
7.9
7,957 reviews
Search Delta flights
JetBluePriceFrom $160Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
United AirlinesPriceFrom $194Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $398Free CancellationRating
8.0
4,242 reviews
Search Southwest flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Boston to San Juan. momondo saves you time and could save you money on your trip.

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

Yes. momondo allows you to filter the results for Boston to San Juan flights to just show those with flexible booking policies.

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

Once all potential Boston to San Juan flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to San Juan from Boston are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your San Juan trip

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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