prices we've seen · United States fares · USD
The cheapest one-way fare from San Francisco to Chicago we have seen is $150 USD, departing Nov 12 (seen Oct 24): Frontier F9 4158, 1 stop, 6h 56m.
Cheapest · One wayseen Oct 24
$150 USD
Frontier F9 4158 · Nov 12 · 1 stop · 6h 56m
Continue on the seller's site — $150Cheapest round tripseen Oct 23
$453 USD
Frontier F9 4402 · Dec 19 → Jan 3 · 2 stops · 32h 28m in all, both ways
Continue on the seller's site — $453a2bflight may earn a commission from the seller if you book after this click; the price you see is the seller's and does not change. How we rank, what we keep.
Checked Oct 25
Pick a month to search the day its cheapest fare leaves.
Each day's cheapest fare we've seen, nonstop and with stops. Cheapest first.
We may earn a commission from the seller · How we rank
The cheapest round trips we've seen on this route, on any dates, cheapest first.
We may earn a commission from the seller · How we rank
Compared with San Francisco → Chicago: $150 one way (Nov 12).
Marketing carriers; the operating airline is shown by the seller.
The cheapest one-way fare from San Francisco to Chicago we have seen is $150 USD, departing Nov 12 (seen Oct 24): Frontier F9 4158, 1 stop, 6h 56m.
None of the 6 departure dates seen has a nonstop fare — every fare has at least one stop; carriers seen: JetBlue, Frontier.
By month, Jan 2027 is the cheapest we've seen at $140 USD and Apr 2027 the most expensive at $1,640 USD — a spread of 1071%.
It is the cheapest fare we've seen for that date; the date beside it is the day it was seen, or our last check. We look again at least once a day for the routes people search, and stop showing a route's prices two days after our last look. The seller's page shows the price right now.
By price and duration only; commission never enters the order. Cheapest means cheapest among the fares we've seen for this route. A click that books may earn a2bflight a commission from the seller; the price you see is the seller's own. See how we rank and what we keep.