Chicago to San Francisco flights
Routavio compares airline fares from several flight booking sites. The lowest one-way fare it found for Chicago to San Francisco is €81 (checked on 30 Oct 2026).
Your next trip, last seen at €81
Lowest observedWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €81, departing 3 Dec 2026 (Last checked: 30 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 25Check live prices for this route
- Airlines seen
- Alaska Airlines, Frontier Airlines
- Non-stop
- Yes
About this route
Explore the fares we observed from Chicago to San Francisco. Prices move often, so pick your dates to see the latest options.
- Route distance
- 2,985 km
- Alternative airports
- CGX, DPA, MDW, PWK, RFD
Route-level information; individual journeys vary.
Published schedules report non-stop service with American Airlines, United Airlines, Southwest Airlines. Check current timetables.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Airport to city: straight-line distance
- Chicago Midway International Airport (MDW) → Chicago, city gazetteer reference point (41.8781, -87.6298): ≈ 14 km.
- Chicago O'Hare International Airport (ORD) → Chicago, city gazetteer reference point (41.8781, -87.6298): ≈ 25 km.
- Chicago Rockford International Airport (RFD) → Chicago, city gazetteer reference point (41.8781, -87.6298): ≈ 126 km.
- San Francisco International Airport (SFO) → San Francisco, city gazetteer reference point (37.7749, -122.4194): ≈ 18 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest month from Chicago to San Francisco: December 2026, from €81 (checked 30 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| November 2026 | €92 | 15 |
| December 2026 | €81 | 8 |
Lowest fare by day of the week
Cheapest day of the week from Chicago to San Francisco: Thursday, from €81 (checked 30 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €84 | 3 |
| Tuesday | €83 | 5 |
| Wednesday | €84 | 4 |
| Thursday | €81 | 4 |
| Friday | €84 | 3 |
| Saturday | €84 | 3 |
| Sunday | €84 | 3 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Chicago to San Francisco by days until departure (31 to 60 days): €81 (checked 30 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €128 | 5 |
| 8 to 30 days | €92 | 10 |
| 31 to 60 days | €81 | 8 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Frequently asked
How much is a flight from Chicago to San Francisco?
The lowest fare Routavio has observed is €81, found on 30 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Chicago to San Francisco?
Cheapest month from Chicago to San Francisco: December 2026, from €81 (checked 30 Oct 2026).
Are there direct flights from Chicago to San Francisco?
Yes. Published schedules report non-stop flights on this route with American Airlines, United Airlines, Southwest Airlines.
Which airlines fly from Chicago to San Francisco?
Routavio has seen these carriers on the route: Alaska Airlines, Frontier Airlines.
How many of the observed Chicago to San Francisco fares were non-stop?
16 of the 32 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which day of the week is cheapest from Chicago to San Francisco?
Cheapest day of the week from Chicago to San Francisco: Thursday, from €81 (checked 30 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.