Cheap flights from Baltimore to San Juan from $126 BWI → SJU
Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU)
The cheapest return found recently is $188 with Frontier Airlines, 4 Feb 2027 – 7 Feb 2027, found 18 hours ago. The cheapest one-way found recently is $126 with Frontier Airlines, 1 Jan 2027, found 4 days ago.
- Cheapest one-way found recently
- $126, found 4 days ago
- Cheapest return found recently
- $188, 4 Feb 2027 to 7 Feb 2027
- Usual return price
- $183 to $251
- Cheapest month to fly
- February 2027, return fares from $173 found in the last 7 days
- Airlines with nonstop flights
- Frontier Airlines, jetBlue, United Airlines
Return
The cheapest return fare on each of 4 departure dates is usually $183 to $251.
Cheapest return found recently
$188
4 Feb 2027 – 7 Feb 2027 · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU)
Leaves 9:55 a.m. · Return leaves 6:05 a.m. · 14 h of travel, both ways together
out 1 stop, back nonstop · via Fort Lauderdale-Hollywood International Airport (FLL)
found 18 hours ago
Cheapest nonstop return
$211
4 Feb 2027 – 7 Feb 2027 · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU)
Leaves 10:21 a.m. · Return leaves 10:26 a.m. · 8 h 19 min of travel, both ways together
out nonstop, back nonstop
found 18 hours ago
Found recently, and the cheapest we hold
$188 4 Feb 2027 – 7 Feb 2027found 18 hours agoSee prices for these dates
$173 4 Feb 2027 – 8 Feb 2027found 2 days agoSee prices for these dates
What have prices looked like?
Over 50 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $163 to $247.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 9 Dec to 4 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 3-night return fares leaving within 3 days of 4 Feb 2027 to compare.
Every date we hold
53 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 9 Dec – 16 Dec | $186 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 10 Dec – 15 Dec | $209 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 30 Dec – 5 Jan 2027 | $375 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back 2 stops | found 4 days ago | See prices for these dates |
| 4 Feb 2027 – 8 Feb 2027 | $173 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back nonstop | found 2 days ago | See prices for these dates |
Which month looks cheapest?
February 2027 is the cheapest month — from $173.
Airlines on the cheapest dates: Frontier Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$126
1 Jan 2027 · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU)
Leaves 9:46 p.m. · 12 h 58 min trip
1 stop
found 4 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$126 1 Jan 2027found 4 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 45 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $39 to $315.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 1 Jan 2027 to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 1 Jan 2027 | $126 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → Luis Munoz Marin International Airport (SJU) | 1 stop | found 4 days ago | Open this trip |
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Baltimore to San Juan
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 4 Feb 2027 – 7 Feb 2027 in another cabin: Premium economy · Business · First
Today's prices for 1 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Baltimore to San Juan?
Return
Fares 14 to 29 days before departure were typically 17% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 12 Nov (50 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $230 | $206 | +20% | 17 |
| 7–13 days | $223 | $178 | +17% | 21 |
| 14–29 days | $191 | $163 | Cheapest seen | 32 |
| 30–59 days | $198 | $180 | +4% | 38 |
| 60–89 days | $191 | $165 | +0% | 40 |
| 90–179 days | $334 | $264 | +75% | 17 |
One-way
The cheapest fares were 14 to 29 days before departure.
From the cheapest one-way each day between 24 Sept and 12 Nov (45 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $48 | $39 | Cheapest seen | 15 |
| 30–59 days | $128 | $126 | +167% | 21 |
| 60–89 days | $138 | $125 | +188% | 16 |
| 90–179 days | $160 | $160 | +233% | 8 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Philadelphia → San Juan
145 km from Baltimore
$116
$72 less than flying from Baltimore
8 Dec – 12 Dec · PHL → SJU · out nonstop, back nonstop
found yesterday
Washington → San Juan
57 km from Baltimore
$395
$207 more than flying from Baltimore
30 Dec – 6 Jan 2027 · IAD → SJU · out 1 stop, back 2 stops
found 4 days ago
Wilmington → San Juan
105 km from Baltimore
$445
$257 more than flying from Baltimore
18 Dec – 5 Jan 2027 · ILG → SJU · out 2 stops, back 1 stop
found 4 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Philadelphia → San Juan
145 km from Baltimore
$60
$66 less than flying from Baltimore
17 Nov · PHL → SJU · nonstop
found yesterday
Washington → San Juan
57 km from Baltimore
$126
The same price as flying from Baltimore
1 Jan 2027 · IAD → SJU · 1 stop
found 4 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 4 Feb 2027 – 7 Feb 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Baltimore to San Juan?
The cheapest return found recently is $188 with Frontier Airlines, 4 Feb 2027 to 7 Feb 2027, found 18 hours ago. The cheapest return we hold, of any age, is $173 with Frontier Airlines, 4 Feb 2027 to 8 Feb 2027, found 2 days ago. The cheapest return fare on each of 4 departure dates is usually $183 to $251.
How much is a one-way flight from Baltimore to San Juan?
The cheapest one-way found recently is $126 with Frontier Airlines, 1 Jan 2027, found 4 days ago.
What is the cheapest month to fly from Baltimore to San Juan?
February 2027 is the cheapest month for a return, from $173, 4 Feb 2027 to 8 Feb 2027, found 2 days ago.
How far ahead should I book a flight from Baltimore to San Juan?
In 50 days of prices between 24 Sept and 12 Nov, return fares 14 to 29 days before departure were typically 17% lower than 0 to 6 days before departure. In 45 days of prices between 24 Sept and 12 Nov, one-way fares were cheapest 14 to 29 days before departure.
Is there a direct flight from Baltimore to San Juan?
Yes, the cheapest nonstop return found recently is $211 with Frontier Airlines, 4 Feb 2027 to 7 Feb 2027, found 18 hours ago.
How long is the flight from Baltimore to San Juan?
The cheapest one-way found recently, with Frontier Airlines on 1 Jan 2027, takes 12 h 58 min with 1 stop.
Which airlines have the cheapest flights from Baltimore to San Juan?
Between 9 Dec and 4 Feb 2027, Frontier Airlines has the cheapest return on all 4 departure dates we hold.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work