San Francisco to Chicago in December 2026
SFO to CHI · Round trips departing in December · Economy · Prices per person in USD
Prices updated
Typical in December
$327
Median of 6 date combinations
Usual on this route
$334
December's cheapest is 20% less
Good price — book if the dates work
20% below the usual $334, and prices have been rising this week. Based on 46 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 | 9 | 10 $319 | 11 | 12 $268 | 13 |
| 14 | 15 | 16 $290 | 17 | 18 | 19 $334 | 20 |
| 21 | 22 | 23 | 24 | 25 $349 | 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$268Frontier Airlines 1 stop · 5h 08mBook
-
Dec 16 – 18 2 nights · leave Wed$290Frontier Airlines 1 stop · 5h 06mBook
-
Dec 10 – 18 8 nights · leave Thu$319Frontier Airlines 1 stop · 5h 25mBook
-
Dec 19 – Jan 3, 2027 15 nights · leave Sat$334Frontier Airlines 1 stop · 5h 07mBook
-
Dec 25 – 31 6 nights · leave Fri$349Frontier Airlines 1 stop · 5h 38mBook
-
Dec 25 – 30 5 nights · leave Fri$355Frontier Airlines 1 stop · 5h 38mBook
Prices change often. The booking site shows the final price before you pay.
Cheapest by trip length
2–4 nights
$290
Dec 16 – 18 · 1 option
5–7 nights
$268
Dec 12 – 19 · 3 options
8–14 nights
$319
Dec 10 – 18 · 1 option
15–21 nights
$334
Dec 19 – Jan 3, 2027 · 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 | $246 (cheapest month) |
| December 2026 | $268 |
| January 2027 | No fares found yet |
| February 2027 | No fares found yet |
| March 2027 | No fares found yet |
| April 2027 | No fares found yet |
| May 2027 | No fares found yet |
| June 2027 | No fares found yet |
| July 2027 | $451 |
| August 2027 | $399 |
San Francisco to Chicago in December: questions
What's the cheapest date to fly from San Francisco to Chicago in December 2026?
Leaving Saturday, December 12 and returning Saturday, December 19 (7 nights) for $268 round trip on Frontier Airlines, the cheapest of the 6 date combinations we track that month.
How much is a round trip from San Francisco to Chicago in December 2026?
From $268. Half of the 6 date combinations we track are under $327. Prices are per person in USD and change often.
Is December a cheap month to fly from San Francisco to Chicago?
It ranks 2 of 4 months we have prices for. The cheapest month is November 2026, from $246.