$78 Cheap Flights from Baltimore (BWI) to San Juan (SJU)

View $78 flight on Thu, Oct 30, 2025Opens in a new window

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU)

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Cheap Flights from Baltimore to San Juan (BWI-SJU)

Prices were available within the past 7 days and start at $78 for one-way flights and $155 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Sep 22 - Tue, Sep 23
BWI
Baltimore
SJU
San Juan
$155 Roundtrip, found 2 hours ago
$155
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Mon, Sep 22 from Baltimore to San Juan, returning Tue, Sep 23, priced at $155 found 2 hours ago
American Airlines
Tue, Oct 7 - Thu, Oct 16
BWI
Baltimore
SJU
San Juan
$163 Roundtrip, found 12 hours ago
$163
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Tue, Oct 7 from Baltimore to San Juan, returning Thu, Oct 16, priced at $163 found 12 hours ago
Spirit Airlines
Thu, Sep 25 - Sat, Sep 27
BWI
Baltimore
SJU
San Juan
$164 Roundtrip, just found
$164
Roundtrip
just found
Select Spirit Airlines flight, departing Thu, Sep 25 from Baltimore to San Juan, returning Sat, Sep 27, priced at $164 just found
Spirit Airlines
Sun, Sep 14 - Thu, Oct 16
BWI
Baltimore
SJU
San Juan
$170 Roundtrip, just found
$170
Roundtrip
just found
Select Spirit Airlines flight, departing Sun, Sep 14 from Baltimore to San Juan, returning Thu, Oct 16, priced at $170 just found
Frontier Airlines
Sun, Aug 31 - Thu, Sep 4
BWI
Baltimore
SJU
San Juan
$177 Roundtrip, found 1 hour ago
$177
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sun, Aug 31 from Baltimore to San Juan, returning Thu, Sep 4, priced at $177 found 1 hour ago
Spirit Airlines
Thu, Aug 14 - Sat, Aug 16
BWI
Baltimore
SJU
San Juan
$179 Roundtrip, just found
$179
Roundtrip
just found
Select Spirit Airlines flight, departing Thu, Aug 14 from Baltimore to San Juan, returning Sat, Aug 16, priced at $179 just found
Spirit Airlines
Sun, Sep 28 - Mon, Nov 10
BWI
Baltimore
SJU
San Juan
$180 Roundtrip, just found
$180
Roundtrip
just found
Select Spirit Airlines flight, departing Sun, Sep 28 from Baltimore to San Juan, returning Mon, Nov 10, priced at $180 just found
Frontier Airlines
Sun, Aug 31 - Thu, Oct 2
BWI
Baltimore
SJU
San Juan
$187 Roundtrip, found 1 hour ago
$187
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sun, Aug 31 from Baltimore to San Juan, returning Thu, Oct 2, priced at $187 found 1 hour ago
United
Sat, Sep 20 - Tue, Sep 23
BWI
Baltimore
SJU
San Juan
$197 Roundtrip, found 2 hours ago
$197
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Sep 20 from Baltimore to San Juan, returning Tue, Sep 23, priced at $197 found 2 hours ago
Southwest Airlines
Wed, Sep 17 - Thu, Sep 18
BWI
Baltimore
SJU
San Juan
$301 Roundtrip, found 2 hours ago
$301
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Wed, Sep 17 from Baltimore to San Juan, returning Thu, Sep 18, priced at $301 found 2 hours ago

Find the cheapest month to fly from Baltimore (BWI) to San Juan (SJU)

May is typically the cheapest month to fly

From $96 - $464 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Juan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $266
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $266
Flights from Baltimore (BWI) to San Juan (SJU)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Luis Munoz Marin Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$155
Distance
1568 mi
Average flight time
4 hours 4 mins

Baltimore to San Juan Flights

The cheapest times to fly from Baltimore to San Juan

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to San Juan are during the month of September. You can find some of the cheapest flights from Baltimore to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Baltimore to San Juan

Sunday is one of the best days to book for cheap flights from Baltimore to San Juan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Baltimore to San Juan

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $78 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to San Juan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to San Juan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU) cost?
Book cheap return fares starting from $152 from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Frontier Airlines flight leaving BWI on August 19 2025 and touching down at SJU. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from BWI to SJU?
The cheapest flights from BWI to SJU are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU)?
Hop on a direct flight with Southwest Airlines and go straight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU).
What is the cheapest airline that flies from BWI to SJU?
With prices starting from $72 for a one-way flight from BWI to SJU, Frontier Airlines is currently the cheapest carrier flying this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from BWI on August 31 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU)?
When flying out of Baltimore Washington Intl. Thurgood Marshall Airport (BWI), you can choose from an average of 2 daily direct flights to Luis Munoz Marin Intl. Airport (SJU).
What are the most popular departure times for flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU)?
More passengers fly between BWI and SJU at 9 AM than at any other time of day. Prefer a quieter experience? Pick a flight outside the busiest times and you're likely to save on your fare as well.
What day of the week has the most flights from BWI to SJU?
Depart on a Friday if you're looking for the best selection of flights from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU).
What is the earliest flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU)?
The first flight of the day out of Baltimore Washington Intl. Thurgood Marshall Airport (BWI) is at around 8:00AM UTC-5. Board this plane and you'll reach Luis Munoz Marin Intl. Airport (SJU) at approximately 1:05PM UTC-4. The total travel time is 4h 5m.
How long does it take to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU)?
Flights from BWI to SJU have an average travel time of 3 hours and 57 minutes. The distance between these two airports is 1,550 mi.
What is the best time to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU)?
To arrive at Luis Munoz Marin Intl. Airport (SJU) on schedule, choose a flight that leaves Baltimore Washington Intl. Thurgood Marshall Airport (BWI) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San Juan from Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Check out your flight options from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU). This is the only airport in San Juan you can jet into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Last-minute bookings from BWI to SJU are generally more expensive. For the lowest prices, start looking for flights as early as possible. That said, if you can play around with your travel dates, it's possible to land a cheap ticket right before your trip.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Luis Munoz Marin Intl. Airport (SJU)?
Generally, it's possible to cancel or reschedule your BWI to SJU flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.