Washington to San Francisco 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 $526 | 2 | 3 | 4 $286 | 5 | 6 | |
| 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 14 | 15 | 16 | 17 $569 | 18 $590 | 19 $514 | 20 $514 |
| 21 | 22 | 23 | 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 4 – 6 2 nights · leave Fri$286Frontier Airlines 1 stop · 7h 16mBook
-
Dec 19 – Jan 3, 2027 15 nights · leave Sat$514United Airlines Nonstop · 6h 13mBook
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Dec 20 – Jan 3, 2027 14 nights · leave Sun$514United Airlines Nonstop · 6h 17mBook
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Dec 1 – 4 3 nights · leave Tue$526Alaska Airlines 1 stop · 6h 22mBook
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Dec 17 – Jan 3, 2027 17 nights · leave Thu$569Southwest Airlines 1 stop · 7h 05mBook
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Dec 18 – Jan 2, 2027 15 nights · leave Fri$590Frontier Airlines 1 stop · 7h 04mBook
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Dec 19 – Jan 2, 2027 14 nights · leave Sat$617Southwest Airlines 1 stop · 6h 50mBook
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 | $511 |
| November 2026 | No fares found yet |
| December 2026 | $286 (cheapest month) |
| January 2027 | $533 |
| February 2027 | No fares found yet |
| March 2027 | $466 |
| April 2027 | $675 |
| May 2027 | $431 |
Washington to San Francisco in December: questions
What's the cheapest date to fly from Washington to San Francisco in December 2026?
Leaving Friday, December 4 and returning Sunday, December 6 (2 nights) for $286 round trip on Frontier Airlines, the cheapest of the 7 date combinations we track that month.
How much is a round trip from Washington to San Francisco in December 2026?
From $286. Half of the 7 date combinations we track are under $526. Prices are per person in USD and change often.
Is December a cheap month to fly from Washington to San Francisco?
Yes. It's the cheapest of the 6 months ahead we have prices for.