Philadelphia to San Juan PHL, TTN → SJU
Philadelphia International Airport (PHL), Trenton-Mercer Airport (TTN) → Luis Munoz Marin International Airport (SJU)
The cheapest return found recently is $571 with Frontier Airlines, 23 Dec – 28 Dec, found yesterday. The cheapest one-way found recently is $66 with Frontier Airlines, 17 Nov, found 2 days ago.
Return
The cheapest return fare on each of 8 departure dates is usually $213 to $351.
Cheapest return found recently
$571
23 Dec – 28 Dec · Frontier Airlines
Trenton-Mercer Airport (TTN) → Luis Munoz Marin International Airport (SJU)
Leaves 9:16 p.m. · Return leaves 5:35 a.m. · 43 h 5 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
$163
22 Oct – 24 Oct · Frontier Airlines
Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU)
Leaves 8:02 p.m. · Return leaves 12:59 a.m. · 7 h 57 min of travel, both ways together
out nonstop, back nonstop
found 2 days ago
Found recently, and the cheapest we hold
$571 23 Dec – 28 Decfound yesterdaySee prices for these dates
$146 9 Nov – 16 Novfound 3 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $121 to $154.
At $571, the cheapest return found recently is above that range.
25 days is a short history, so treat this range as an early guide.
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 8 departure dates from 22 Oct to 24 Apr 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 5-night return fares leaving within 3 days of 23 Dec to compare.
Every date we hold
17 fares on 8 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 22 Oct – 24 Oct | $163 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | out nonstop, back nonstop | found 2 days ago | See prices for these dates |
| 9 Nov – 16 Nov | $146 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | out nonstop, back 1 stop | found 3 days ago | See prices for these dates |
| 13 Nov – 15 Nov | $251 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | out nonstop, back nonstop | found 6 days ago | See prices for these dates |
| 19 Nov – 22 Nov | $291 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | out nonstop, back 1 stop | found 4 days ago | See prices for these dates |
| 1 Dec – 7 Jan 2027 | $588 | Frontier Airlines | Trenton-Mercer Airport (TTN) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 23 Dec – 28 Dec | $519 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 15 Jan 2027 – 19 Jan 2027 | $295 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | out nonstop, back nonstop | found 4 days ago | See prices for these dates |
| 24 Apr 2027 – 15 May 2027 | $230 | American Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $146.
Airlines on the cheapest dates: Frontier Airlines, American Airlines.
One-way
The cheapest one-way fare on each of 7 departure dates is usually $63 to $196.
Cheapest one-way found recently
$66
17 Nov · Frontier Airlines
Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU)
Leaves 11:27 a.m. · 3 h 50 min trip
nonstop
found 2 days ago
Cheapest nonstop one-way
$66
17 Nov · Frontier Airlines
Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU)
Leaves 11:27 a.m. · 3 h 50 min trip
nonstop
found 2 days ago
Found recently, and the cheapest we hold
$66 17 Novfound 2 days agoOpen this trip
$45 25 Octfound 3 days agoOpen this trip
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $45 to $73.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 7 departure dates from 20 Oct to 23 Dec, 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 one-way fares leaving within 3 days of 17 Nov to compare.
Every date we hold
9 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Oct | $75 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | nonstop | found 4 days ago | Open this trip |
| 23 Oct | $72 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | nonstop | found 5 days ago | Open this trip |
| 25 Oct | $45 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | nonstop | found 3 days ago | Open this trip |
| 13 Nov | $60 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | nonstop | found 5 days ago | Open this trip |
| 17 Nov | $66 | Frontier Airlines | Philadelphia International Airport (PHL) → Luis Munoz Marin International Airport (SJU) | nonstop | found 2 days ago | Open this trip |
| 21 Dec | $316 | Frontier Airlines | Trenton-Mercer Airport (TTN) → Luis Munoz Marin International Airport (SJU) | 1 stop | found 3 days ago | Open this trip |
| 23 Dec | $480 | Frontier Airlines | Trenton-Mercer Airport (TTN) → Luis Munoz Marin International Airport (SJU) | 1 stop | found 5 days ago | Open this trip |
Which month looks cheapest?
October 2026 is the cheapest month — from $45.
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Philadelphia 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 23 Dec – 28 Dec in another cabin: Premium economy · Business · First
Today's prices for 17 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Philadelphia to San Juan?
Return
Fares 60 to 89 days before departure were typically 19% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 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 | $163 | $131 | +23% | 19 |
| 7–13 days | $134 | $131 | +1% | 22 |
| 14–29 days | $143 | $122 | +8% | 23 |
| 30–59 days | $156 | $121 | +18% | 25 |
| 60–89 days | $133 | $121 | Cheapest seen | 24 |
| 90–179 days | $204 | $173 | +54% | 24 |
| 180+ days | $246 | $230 | +86% | 25 |
One-way
Fares 30 to 59 days before departure were typically 7% lower than 0 to 6 days before departure.
From the cheapest one-way each day between 24 Sept and 18 Oct (25 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 | $62 | $62 | +7% | 11 |
| 7–13 days | $71 | $45 | +22% | 22 |
| 14–29 days | $73 | $55 | +26% | 22 |
| 30–59 days | $58 | $58 | Cheapest seen | 18 |
| 60–89 days | $217 | $112 | +274% | 25 |
| 90–179 days | $112 | $67 | +93% | 12 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
New York → San Juan
130 km from Philadelphia
$308
$263 less than flying from Philadelphia
19 Nov – 28 Nov · JFK → SJU · out nonstop, back nonstop
found 9 hours ago
Baltimore → San Juan
145 km from Philadelphia
$191
$380 less than flying from Philadelphia
6 Nov – 10 Nov · BWI → SJU · out 1 stop, back 1 stop
found 3 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Baltimore → San Juan
145 km from Philadelphia
$39
$27 less than flying from Philadelphia
8 Nov · BWI → SJU · nonstop
found 4 days ago
New York → San Juan
130 km from Philadelphia
$152
$86 more than flying from Philadelphia
3 Jan 2027 · EWR → SJU · nonstop
found 2 days ago
Philadelphia → Ponce
74 km from San Juan
$202
$136 more than flying to San Juan
26 Nov · TTN → PSE · 1 stop
found 6 days ago
Allentown → San Juan
77 km from Philadelphia
$219
$153 more than flying from Philadelphia
18 Nov · ABE → SJU · 1 stop
found 6 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 23 Dec – 28 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
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