Nonstop fares between Chicago and San Francisco dropped to $178 roundtrip, including tax. These Frontier Airlines flights save up to $100 on the usual cost.

Save an additional $20 with Frontier when you sign up for their Discount Den email list during the booking process. These extra savings for email subscribers are not valid on every date, but seem to be pretty widely available from our research. Also worth noting, fares are available for $179 roundtrip, including tax, on American Airlines on select dates, which offers potentially a better value when compared to Frontier, depending on your luggage.

Fly.com Fare Calendars:

Savings:

  • Up to $100 OFF regular pricing

Travel Dates:

  • Through October

Sample Screenshots:

San Francisco to Chicago: Fly.com Results

San Francisco to Chicago: Fly.com Results

San Francisco to Chicago: Frontier Booking Page

San Francisco to Chicago: Frontier Booking Page

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