Philadelphia to San Juan in December 2026
PHL to SJU · Round trips departing in December · Economy · Prices per person in USD
Prices updated
Typical in December
$346
Median of 6 date combinations
Usual on this route
$184
December's cheapest is 22% less
Good price — book if the dates work
22% below the usual $184, and prices have been rising this week. Based on 47 days of prices.
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December 2026 by departure day
Cheapest round trip leaving that day| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 $143 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 $344 | 19 | 20 |
| 21 | 22 $495 | 23 $458 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 31 |
Empty days: no round trip found for that departure date yet. Green = cheapest third of the month.
Cheapest dates in December 2026
Round trip, per person-
Dec 8 – 12 4 nights · leave Tue$143Frontier Airlines 1 stop · 5h 42mBook
-
Dec 18 – 25 7 nights · leave Fri$344Frontier Airlines Nonstop · 3h 48mBook
-
Dec 18 – 26 8 nights · leave Fri$344Frontier Airlines Nonstop · 3h 48mBook
-
Dec 18 – 23 5 nights · leave Fri$347Frontier Airlines Nonstop · 3h 48mBook
-
Dec 23 – 28 5 nights · leave Wed$458Frontier Airlines 1 stop · 3h 56mBook
-
Dec 22 – Jan 2, 2027 11 nights · leave Tue$495Frontier Airlines 1 stop · 5h 52mBook
Prices change often. The booking site shows the final price before you pay.
Cheapest by trip length
2–4 nights
$143
Dec 8 – 12 · 1 option
5–7 nights
$344
Dec 18 – 25 · 3 options
8–14 nights
$344
Dec 18 – 26 · 2 options
Good to know for December
Airline
Frontier Airlines
Every cheap fare we track on this route is on Frontier Airlines.
December vs other months
Cheapest round trip per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $155 |
| December 2026 | $143 (cheapest month) |
| January 2027 | $184 |
| February 2027 | $146 |
| March 2027 | $238 |
| April 2027 | $366 |
| May 2027 | $369 |
Philadelphia to San Juan in December: questions
What's the cheapest date to fly from Philadelphia to San Juan in December 2026?
Leaving Tuesday, December 8 and returning Saturday, December 12 (4 nights) for $143 round trip on Frontier Airlines, the cheapest of the 6 date combinations we track that month.
How much is a round trip from Philadelphia to San Juan in December 2026?
From $143. Half of the 6 date combinations we track are under $346. Prices are per person in USD and change often.
Is December a cheap month to fly from Philadelphia to San Juan?
Yes. It's the cheapest of the 7 months ahead we have prices for.