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Cheap flights from Boston to San Juan from $123

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 11/18. 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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Cheap round-trip flights

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Frontier Logo
10:18 am - 3:22 pmBOS-SJU
4h 04mnonstop
Frontier Logo
8:25 am - 11:48 amSJU-BOS
4h 23mnonstop
$200Frontier
Find Deal
dom., ene. 4 - dom., ene. 11
Multiple Airlines Logo
9:27 am - 1:42 amBOS-SJU
15h 15m1 stop
Multiple Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$201Multiple Airlines
Find Deal
vie., ene. 30 - vie., feb. 6
Spirit Airlines Logo
11:13 am - 4:07 pmBOS-SJU
3h 54mnonstop
Spirit Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$207Spirit Airlines
Find Deal
jue., ene. 29 - mar., feb. 3
Spirit Airlines Logo
9:39 pm - 9:52 amBOS-SJU
11h 13m1 stop
Spirit Airlines Logo
5:27 pm - 8:34 pmSJU-BOS
4h 07mnonstop
$208Spirit Airlines
Find Deal
sáb., ene. 31 - mar., feb. 10
Frontier Logo
12:43 pm - 5:47 pmBOS-SJU
4h 04mnonstop
Frontier Logo
3:55 am - 10:20 amSJU-BOS
7h 25m1 stop
$209Frontier
Find Deal
dom., ene. 11 - vie., ene. 16
Multiple Airlines Logo
7:48 pm - 12:55 amBOS-SJU
4h 07mnonstop
Multiple Airlines Logo
8:25 am - 11:48 amSJU-BOS
4h 23mnonstop
$210Multiple Airlines
Find Deal
jue., ene. 1 - dom., ene. 11
Frontier Logo
12:18 pm - 5:22 pmBOS-SJU
4h 04mnonstop
Frontier Logo
9:37 pm - 10:20 amSJU-BOS
13h 43m1 stop
$211Frontier
Find Deal
jue., ene. 1 - mié., ene. 14
Frontier Logo
11:47 am - 8:24 pmBOS-SJU
7h 37m1 stop
Frontier Logo
4:11 pm - 1:04 amSJU-BOS
9h 53m1 stop
$212Frontier
Find Deal
dom., ene. 18 - sáb., ene. 24
JetBlue Logo
7:00 pm - 11:59 pmBOS-SJU
3h 59mnonstop
JetBlue Logo
8:10 pm - 11:16 pmSJU-BOS
4h 06mnonstop
$223JetBlue
Find Deal
lun., nov. 10 - vie., nov. 14
JetBlue Logo
6:00 pm - 11:00 pmBOS-SJU
4h 00mnonstop
JetBlue Logo
6:15 am - 9:23 amSJU-BOS
4h 08mnonstop
$225JetBlue
Find Deal
sáb., feb. 28 - vie., mar. 6

Frontier flights from Boston to San Juan

Our best Frontier deals on Boston to San Juan flight tickets
Frontier
Jan 4
BOS10:18 amBoston Logan Intl
4h 04m
SJU3:22 pmSan Juan Luis Munoz Marin Intl
Jan 11
SJU8:25 amSan Juan Luis Munoz Marin Intl
4h 23m
BOS11:48 amBoston Logan Intl
$200
Find similar
Frontier
Jan 11
BOS12:43 pmBoston Logan Intl
4h 04m
SJU5:47 pmSan Juan Luis Munoz Marin Intl
Jan 16
SJU3:55 amSan Juan Luis Munoz Marin Intl
7h 25m
1 stop
BOS10:20 amBoston Logan Intl
$209
Find similar
Frontier
Jan 1
BOS12:18 pmBoston Logan Intl
4h 04m
SJU5:22 pmSan Juan Luis Munoz Marin Intl
Jan 14
SJU9:37 pmSan Juan Luis Munoz Marin Intl
13h 43m
1 stop
BOS10:20 amBoston Logan Intl
$211
Find similar

Spirit Airlines flights from Boston to San Juan

Our best Spirit Airlines deals on Boston to San Juan flight tickets
Spirit Airlines
Jan 29
BOS11:13 amBoston Logan Intl
3h 54m
SJU4:07 pmSan Juan Luis Munoz Marin Intl
Feb 3
SJU5:27 pmSan Juan Luis Munoz Marin Intl
4h 07m
BOS8:34 pmBoston Logan Intl
$207
Find similar
Spirit Airlines
Jan 31
BOS9:39 pmBoston Logan Intl
11h 13m
1 stop
SJU9:52 amSan Juan Luis Munoz Marin Intl
Feb 10
SJU5:27 pmSan Juan Luis Munoz Marin Intl
4h 07m
BOS8:34 pmBoston Logan Intl
$208
Find similar
Spirit Airlines
Feb 1
BOS9:39 pmBoston Logan Intl
11h 13m
1 stop
SJU9:52 amSan Juan Luis Munoz Marin Intl
Feb 4
SJU12:10 pmSan Juan Luis Munoz Marin Intl
10h 58m
1 stop
BOS10:08 pmBoston Logan Intl
$216
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 octubre 22, 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

dom. 1/4

10:18 am-3:22 pm

Nonstop4h 04m

San Juan Luis Munoz Marin Intl

dom. 1/11

8:25 am-11:48 am

Nonstop4h 23m

$200

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

vie. 1/30

9:27 am-1:42 am

1 stop15h 15m

San Juan Luis Munoz Marin Intl

vie. 2/6

5:27 pm-8:34 pm

Nonstop4h 07m

$201

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

jue. 1/29

11:13 am-4:07 pm

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

mar. 2/3

5:27 pm-8:34 pm

Nonstop4h 07m

$207

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

sáb. 1/31

9:39 pm-9:52 am

1 stop11h 13m

San Juan Luis Munoz Marin Intl

mar. 2/10

5:27 pm-8:34 pm

Nonstop4h 07m

$208

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

dom. 1/11

12:43 pm-5:47 pm

Nonstop4h 04m

San Juan Luis Munoz Marin Intl

vie. 1/16

3:55 am-10:20 am

1 stop7h 25m

$209

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

jue. 1/1

7:48 pm-12:55 am

Nonstop4h 07m

San Juan Luis Munoz Marin Intl

dom. 1/11

8:25 am-11:48 am

Nonstop4h 23m

$210

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

jue. 1/1

12:18 pm-5:22 pm

Nonstop4h 04m

San Juan Luis Munoz Marin Intl

mié. 1/14

9:37 pm-10:20 am

1 stop13h 43m

$211

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

dom. 1/18

11:47 am-8:24 pm

1 stop7h 37m

San Juan Luis Munoz Marin Intl

sáb. 1/24

4:11 pm-1:04 am

1 stop9h 53m

$212

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

lun. 11/10

7:00 pm-11:59 pm

Nonstop3h 59m

San Juan Luis Munoz Marin Intl

vie. 11/14

8:10 pm-11:16 pm

Nonstop4h 06m

$223

BostonSan Juan

BOS - SJU

BOSSJU

Boston Logan Intl

sáb. 2/28

6:00 pm-11:00 pm

Nonstop4h 00m

San Juan Luis Munoz Marin Intl

vie. 3/6

6:15 am-9:23 am

Nonstop4h 08m

$225

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 January, then March is your next best option. Flight prices from Boston to San Juan during March average around $264.

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 $294. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $340.

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 $313. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $350 on average. Flights to San Juan from Boston at noon 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 $295 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 $247 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 54m

Direct flights

Every day

Airports in San Juan

1 airport
The fastest flight from Boston to San Juan takes 3h 54m
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
3,130 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $101Free CancellationRating
6.3
8,097 reviews
Search Spirit Airlines flights
DeltaPriceFrom $144Free CancellationRating
7.9
7,980 reviews
Search Delta flights
JetBluePriceFrom $170Free CancellationRating
7.2
2,909 reviews
Search JetBlue flights
United AirlinesPriceFrom $190Free CancellationRating
7.4
8,988 reviews
Search United Airlines flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
11,028 reviews
Search American Airlines flights
SouthwestPriceFrom $398Free CancellationRating
8.0
4,237 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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1 adult
vie. 11/21
vie. 11/28
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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