Cheap flights from Chicago to San Francisco
Cheapest return fare right now: $271Nov 18 – Nov 21 · Frontier Airlines
- Direct flights
- No
- Typical flight time
- 5 h 36 min
- Price range seen
- $271 – $337
- Cheapest month (next 3 months)
- November 2026
Best dates
| Dates | Nights | Airline | Stops | From | Price | |
|---|---|---|---|---|---|---|
| Nov 18 – Nov 21 | 3 | Frontier Airlines | 1 | Chicago O'Hare | $271 | Book → |
| Oct 26 – Oct 29 | 3 | Allegiant Air | 1 | Rockford | $284 | Book → |
| Nov 18 – Nov 21 | 3 | Frontier Airlines | 1 | Chicago O'Hare | $337 | Book → |
Prices checked on October 12, 2026.
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