£70+ Cheap flights from San Juan

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SJU — LHR
16 Mar — 23 Mar1
1 adult
1 adult, Economy, 0 bags

What to know about flights from San Juan

Discover essential information about flights departing from San Juan, including flight schedules, destinations, airlines operating at the San Juan airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 14 February 2026.

Cheapest one-way flight

£546

Most popular destination

Newark (EWR)
The cheapest one-way flight from San Juan is currently to Newark.
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Newark (EWR) is currently the most popular flight destination from San Juan (average return price of £547).
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Find flights from San Juan

Enter your travel dates to find the best prices.

Cheapest flights from San Juan
Explore the most affordable flight options available from San Juan. Find the lowest fares based on data from user searches, with prices last updated on 14 February 2026.

Thu 26/211:22
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Sun 1/320:01
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Deal found 11/2£90
Wed 25/215:30
SJU
-
BOS
Nonstop4h 26m
Spirit Airlines
Sun 1/315:00
BOS
-
SJU
Nonstop4h 06m
Spirit Airlines
Deal found 11/2£108
Tue 3/311:22
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Sun 8/320:01
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Deal found 13/2£125
Thu 5/311:52
SJU
-
BOS
1 stop13h 07m
Spirit Airlines
Sun 8/320:01
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Deal found 11/2£135
Wed 4/311:22
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Sun 8/320:01
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Deal found 11/2£140
Mon 2/311:22
SJU
-
BOS
Nonstop4h 21m
Spirit Airlines
Sun 8/320:01
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Deal found 13/2£148
Fri 6/316:31
SJU
-
BOS
1 stop8h 13m
Spirit Airlines
Sun 8/320:01
BOS
-
SJU
Nonstop4h 07m
Spirit Airlines
Deal found 11/2£164
Sat 16/513:30
SJU
-
BOS
Nonstop4h 23m
Delta
Tue 19/508:20
BOS
-
SJU
Nonstop4h 08m
Delta
Deal found 13/2£178
Tue 24/221:25
SJU
-
MAD
Nonstop8h 15m
British Airways
Tue 3/315:50
MAD
-
SJU
Nonstop9h 05m
British Airways
Deal found 10/2£335
Wed 25/207:30
SJU
-
MAD
2 stops19h 30m
KLM
Wed 4/310:00
MAD
-
SJU
2 stops18h 58m
KLM
Deal found 10/2£339
Tue 3/310:20
SJU
-
MAD
1 stop17h 35m
British Airways
Thu 19/315:50
MAD
-
SJU
Nonstop9h 05m
British Airways
Deal found 13/2£340
Wed 4/308:30
SJU
-
MAD
2 stops18h 30m
United Airlines
Wed 18/305:55
MAD
-
SJU
2 stops20h 27m
United Airlines
Deal found 13/2£342

Find flights from San Juan within your budget

 
Find flights departing from San Juan that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 14 February 2026. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Heathrow

Route

Depart

Return

Price

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Wed 25/2

15:30-18:56

Nonstop4h 26m

Boston Logan Intl

Sun 1/3

15:00-20:06

Nonstop4h 06m

£108

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Sat 20/6

06:00-10:05

Nonstop4h 05m

Boston Logan Intl

Mon 22/6

21:26-01:28

Nonstop4h 02m

£178

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Sat 16/5

13:30-17:53

Nonstop4h 23m

Boston Logan Intl

Tue 19/5

08:20-12:28

Nonstop4h 08m

£178

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Fri 8/5

13:30-17:53

Nonstop4h 23m

Boston Logan Intl

Sun 10/5

05:40-13:19

1 stop7h 39m

£182

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Fri 8/5

13:30-17:53

Nonstop4h 23m

Boston Logan Intl

Tue 12/5

06:00-16:23

1 stop10h 23m

£182

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Thu 28/5

13:30-17:53

Nonstop4h 23m

Boston Logan Intl

Tue 2/6

06:00-16:23

1 stop10h 23m

£182

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Fri 22/5

13:10-23:05

1 stop9h 55m

Boston Logan Intl

Tue 26/5

08:20-12:28

Nonstop4h 08m

£182

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Thu 28/5

13:30-17:53

Nonstop4h 23m

Boston Logan Intl

Sat 30/5

06:00-16:23

1 stop10h 23m

£182

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Wed 5/8

14:35-23:32

1 stop8h 57m

Boston Logan Intl

Wed 12/8

08:10-12:16

Nonstop4h 06m

£182

San JuanBoston

SJU - BOS

SJUBOS

San Juan Luis Munoz Marin Intl

Sat 7/3

11:22-14:43

Nonstop4h 21m

Boston Logan Intl

Sun 8/3

20:01-00:08

Nonstop4h 07m

£192

Flights are sorted by cheapest return flights first.

Deals found on 11/2

Showing 1-10 of 60 results
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Best time to book a flight from San Juan

Have a flexible travel schedule? Discover the best time to fly from San Juan with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from San Juan

Get recent, data-driven insights about flights from San Juan including ideal travel times, pricing trends, and more.

When is the best time to book a flight from San Juan?

Use this chart to determine the optimal time to book a return flight from San Juan to Heathrow. Price data was last updated on 6 February 2026.

Booking 69 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from San Juan?

Currently, September is the cheapest month in which you can book a flight from San Juan (average of £74). Flying from San Juan in June will prove the most costly (average of £675). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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Direct flights from Puerto Rico

Book a direct flight from one of these other cities located in Puerto Rico.
Direct flights from Aguadilla
Direct flights from Luis Munoz Marin Intl

Related info for your journey

Access useful and relevant information related to your journey from San Juan. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 14 February 2026.

  • What is the cheapest month to fly from San Juan?

    At the present moment the cheapest month to fly from San Juan is currently September; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • How does Cheapflights help users find flights from San Juan?

    Deals for flights from San Juan are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

  • Why should you use Cheapflights to find cheap flight tickets from San Juan?

    Cheapflights helps you find that perfect flight from San Juan by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

  • Can Cheapflights find flights from San Juan with no change fees?

    Users can book flights with no change fees policies with our dedicated filters. Book flights from San Juan flexibly with Cheapflights today.

  • Can Cheapflights notify me if prices for flights from San Juan become cheaper?

    Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!

See more FAQs

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Juan?

Deals for flights from San Juan are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from San Juan?

Cheapflights helps you find that perfect flight from San Juan by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from San Juan with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Juan flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from San Juan become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and use a valid email address to enable the Price Alerts feature. That’s it!

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