Miami to San Juan in December 2026
MIA to SJU · Round trips departing in December · Economy · Prices per person in USD
Prices updated
Typical in December
$125
Median of 7 date combinations
Usual on this route
$204
December's cheapest is 44% less
Good price — book if the dates work
44% below the usual $204, 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 $120 | 2 | 3 | 4 | 5 $115 | 6 | |
| 7 | 8 $120 | 9 | 10 $125 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 $271 |
| 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 5 – 12 7 nights · leave Sat$115Frontier Airlines Nonstop · 2h 41mBook
-
Dec 1 – 5 4 nights · leave Tue$120Frontier Airlines Nonstop · 2h 41mBook
-
Dec 8 – 11 3 nights · leave Tue$120Frontier Airlines Nonstop · 2h 41mBook
-
Dec 10 – 13 3 nights · leave Thu$125Frontier Airlines Nonstop · 2h 41mBook
-
Dec 1 – 4 3 nights · leave Tue$134Frontier Airlines Nonstop · 2h 41mBook
-
Dec 27 – 31 4 nights · leave Sun$271Frontier Airlines 1 stop · 2h 36mBook
-
Dec 27 – 30 3 nights · leave Sun$275Frontier Airlines 1 stop · 2h 36mBook
Prices change often. The booking site shows the final price before you pay.
Cheapest by trip length
2–4 nights
$120
Dec 1 – 5 · 6 options
5–7 nights
$115
Dec 5 – 12 · 1 option
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 | $204 |
| December 2026 | $115 (cheapest month) |
| January 2027 | $206 |
| February 2027 | $179 |
| March 2027 | No fares found yet |
| April 2027 | No fares found yet |
| May 2027 | No fares found yet |
| June 2027 | $472 |
Miami to San Juan in December: questions
What's the cheapest date to fly from Miami to San Juan in December 2026?
Leaving Saturday, December 5 and returning Saturday, December 12 (7 nights) for $115 round trip on Frontier Airlines, the cheapest of the 7 date combinations we track that month.
How much is a round trip from Miami to San Juan in December 2026?
From $115. Half of the 7 date combinations we track are under $125. Prices are per person in USD and change often.
Is December a cheap month to fly from Miami to San Juan?
Yes. It's the cheapest of the 5 months ahead we have prices for.