Philadelphia to San Juan in December 2026
Round trips departing in December · Economy · Prices per person in USD
Prices updated
Buy now or wait? We're still learning this route. We have 1 day of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when December fares drop below your price.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 | 9 | 10 | 11 $149 | 12 $121 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 $174 | 22 $406 | 23 $561 | 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 12 – 19 7 nights · leave Sat$121Frontier Airlines Nonstop · 3h 46mBook
-
Dec 11 – 18 7 nights · leave Fri$149Frontier Airlines Nonstop · 3h 46mBook
-
Dec 21 – 26 5 nights · leave Mon$174Frontier Airlines 1 stop · 6h 05mBook
-
Dec 21 – 27 6 nights · leave Mon$200Frontier Airlines 1 stop · 6h 05mBook
-
Dec 22 – Jan 3, 2027 12 nights · leave Tue$406Frontier Airlines 1 stop · 3h 48mBook
-
Dec 23 – Jan 3, 2027 11 nights · leave Wed$561American Airlines 1 stop · 5h 38mBook
Prices change often. The booking site shows the final price before you pay.
Cheapest by trip length
Good to know for December
December vs other months
Cheapest round trip per departure month| Month | Cheapest round trip |
|---|---|
| September 2026 | No fares found yet |
| October 2026 | $131 |
| November 2026 | $124 |
| December 2026 | $121 (cheapest month) |
| January 2027 | $155 |
| February 2027 | $249 |
| March 2027 | $334 |
| April 2027 | No fares found yet |
| May 2027 | $251 |
Philadelphia to San Juan in December: questions
What's the cheapest date to fly from Philadelphia to San Juan in December 2026?
Leaving Saturday, December 12 and returning Saturday, December 19 (7 nights) for $121 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 $121. Half of the 6 date combinations we track are under $187. 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.