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Flights from Chicago to San Francisco

Search cheap flights from Chicago to San Francisco in the next 3 months. Based on Trip.com's latest 7-day data, one-way fares start at US$119, and round-trip tickets start at US$200.

      • ORD 14:18
        9h 24m
        1 stop
        SFO 21:42
        Chicago - San Francisco | Mon, Aug 24 | Alaska Airlines
        SFO 20:23
        7h 54m
        1 stop
        ORD 06:17
        San Francisco - Chicago | Mon, Aug 31 | Frontier Airlines
        US$200 US$352
        43% off
        43% off
        US$352 US$200
      • ORD 07:22
        4h 41m
        Nonstop
        SFO 10:03
        Chicago - San Francisco | Mon, Aug 24 | American Airlines
        SFO 20:23
        7h 54m
        1 stop
        ORD 06:17
        San Francisco - Chicago | Mon, Aug 31 | Frontier Airlines
        US$201 US$352
        43% off
        43% off
        US$352 US$201
      • ORD 15:20
        4h 40m
        Nonstop
        SFO 18:00
        Chicago - San Francisco | Tue, Aug 25 | American Airlines
        SFO 20:23
        7h 54m
        1 stop
        ORD 06:17
        San Francisco - Chicago | Tue, Sep 1 | Frontier Airlines
        US$205 US$352
        42% off
        42% off
        US$352 US$205
      • ORD 06:01
        8h 59m
        1 stop
        SFO 13:00
        Chicago - San Francisco | Tue, Aug 25 | Alaska Airlines
        SFO 20:23
        7h 54m
        1 stop
        ORD 06:17
        San Francisco - Chicago | Tue, Sep 1 | Frontier Airlines
        US$209
        41% off
        US$352 US$209
      • CHI 13:00
        17h 25m
        1 stop
        SFO 14:00
        Chicago - San Francisco | Thu, Jul 23 | Normal Airline
        SFO 15:00
        6h
        Nonstop
        CHI 16:00
        San Francisco - Chicago | Sat, Jul 25 | Normal Airline
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        Find more flights
      • Cheapest nonstop
        ORD 17:05
        4h 43m
        Nonstop
        SFO 19:48
        Chicago - San Francisco | Sat, Sep 5 | American Airlines
        US$119 US$158
        25% off
        25% off
        US$158 US$119
      • ORD 14:18
        9h 24m
        1 stop
        SFO 21:42
        Chicago - San Francisco | Thu, Aug 27 | Alaska Airlines
        US$117 US$158
        26% off
        26% off
        US$158 US$117
      • ORD 14:18
        9h 24m
        1 stop
        SFO 21:42
        Chicago - San Francisco | Sat, Sep 5 | Alaska Airlines
        US$120 US$158
        24% off
        24% off
        US$158 US$120
      • ORD 14:36
        6h 54m
        1 stop
        SFO 19:30
        Chicago - San Francisco | Thu, Aug 27 | Delta Air Lines
        US$120
        24% off
        US$158 US$120
      • MDW 11:50
        9h 13m
        1 stop
        SFO 19:03
        Chicago - San Francisco | Wed, Aug 26 | Frontier Airlines
        US$121
        23% off
        US$158 US$121
      • ORD 15:25
        10h 33m
        1 stop
        SFO 23:58
        Chicago - San Francisco | Wed, Sep 2 | Delta Air Lines
        US$121
        23% off
        US$158 US$121
      • CHI 13:00
        17h 25m
        1 stop
        SFO 14:00
        Chicago - San Francisco | Thu, Jul 23 | Normal Airline
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Cheapest airlines flights from Chicago to San Francisco

You can choose from 3 airlines that fly from Chicago to San Francisco, including United Airlines, American Airlines, and Delta Air Lines. American Airlines has lowest fares on this route.
United Airlines logo United Airlines
American Airlines logo American Airlines
Delta Air Lines logo Delta Air Lines
Airlines are determined based on actual purchased flight tickets from Chicago to San Francisco according to previous 12 months data from Trip.com.

Chicago to San Francisco Flight Details

The distance between Chicago and San Francisco is about 2,987.76 km. The average flying time from Chicago to San Francisco is around 5 hours 11 minutes. Based on Trip.com's latest data, travel demand is highest in July. The off-season for travel is November.

Cheapest one-way flight price US$117
Cheapest return ticket price US$200
Cheapest month November
Peak season for travel July
Flight distance 2,987.76 km
Average flight time 5 hours 11 minutes
Popular airline United Airlines
Flight statistics for the Chicago–San Francisco route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from Chicago to San Francisco

Which month has the cheapest one-way flights from Chicago to San Francisco?

Average monthly one-way flight prices from Chicago to San Francisco, based on bookings made by Trip.com users over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Chicago to San Francisco is July, with an average price of US$199; while the month with the highest flight price is usually December, with an average price of up to US$307.

US$307
US$253
US$199
US$145
  • US$199
    Jul
  • US$215
    Aug
  • US$209
    Sep
  • US$285
    Oct
  • US$269
    Nov
  • US$307
    Dec
  • US$281
    Jan
  • US$297
    Feb
  • US$282
    Mar
  • US$248
    Apr
  • US$259
    May
  • US$275
    Jun

Which month has the cheapest round-trip flights from Chicago to San Francisco?

The average price of round-trip flights from Chicago to San Francisco purchased by Trip.com users by month over the past 12 months.

Based on data from Trip.com, the lowest prices for round-trip flights from Chicago to San Francisco are found during July, with an average price of US$322. Conversely, the highest prices are found during November, with an average price of up to US$677.

US$677
US$500
US$322
US$145
  • US$322
    Jul
  • US$385
    Aug
  • US$450
    Sep
  • US$441
    Oct
  • US$677
    Nov
  • US$497
    Dec
  • US$476
    Jan
  • US$415
    Feb
  • US$557
    Mar
  • US$500
    Apr
  • US$469
    May
  • US$583
    Jun

Frequently Asked Questions

  • What are the cheapest flights from Chicago to San Francisco (CHI-SFO)?

    Based on Trip.com data, Alaska Airlines offers one-way fares as low as US$117 on Cheapest nonstop routes (e.g. ORD to SFO on Thu, Aug 27), while Alaska Airlines offers Cheapest nonstop round-trips from US$200 departing on Mon, Aug 24 and returning on Mon, Aug 31.
  • At the moment, you can catch a nonstop flight from Chicago to San Francisco with the following airlines, including: United Airlines American Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 5 hours 11 minutes to fly from Chicago to San Francisco.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 138 flight per week flying from Chicago to San Francisco. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA246 (06:43) United Airlines: S/M/T/W/T/F/S -- UA574 (07:52)
  • To find best deals on flights from Chicago to San Francisco, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Aug 27, with one-way flights priced at just US$117.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is American Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Chicago to San Francisco is November, when demand for travel is lower.
  • After crunching the numbers on our July flight calendar, it's currently cheapest to fly from Chicago to San Francisco on July 21, 2026 with Frontier Airlines, with prices starting at US$115.
  • You can land at any one of the following hubs in San Francisco, with O'Hare International Airport to San Francisco International Airport (ORD-SFO) is by far the most common option on this route: San Francisco International Airport (SFO).
  • The time difference between San Francisco and Chicago is 2h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com Airline Insights on Flights from Chicago to San Francisco

Which airline offers the cheapest direct flights from Chicago to San Francisco?

Data is based on the average price of all nonstop flights from Chicago to San Francisco on Trip.com over the past 12 months.

Based on Trip.com’s data from the past 12 months, Hawaiian Airlines provides the lowest-priced direct flights from Chicago to San Francisco, with fares starting at US$168.

US$107
US$168
US$230
US$292
US$353
Hawaiian Airlines
US$168
Hawaiian Airlines
Frontier Airlines
US$193
Frontier Airlines
Alaska Airlines
US$202
Alaska Airlines
American Airlines
US$265
American Airlines
United Airlines
US$353
United Airlines

Which airline operates the most flights from Chicago to San Francisco?

Total flights from Chicago to San Francisco across all airlines. (Based on Trip.com data from the past month)

Based on Trip.com’s data from the past month, United Airlines operates the most frequent flights from Chicago to San Francisco, with 122 flights per week.

8
46
84
122
United Airlines
122
United Airlines
Air New Zealand
85
Air New Zealand
Air Canada
84
Air Canada
Virgin Australia
77
Virgin Australia
American Airlines
46
American Airlines
Qantas Airways
46
Qantas Airways

How many flights fly from Chicago to San Francisco daily?

The data is based on the flight numbers for each day of the week from Chicago to San Francisco within the Trip.com database over the past month.

Based on the past month's historical data from Trip.com, the number of flights from Chicago to San Francisco is the highest on Saturday and the lowest on Monday.

461
413
364
316
Highest
364
Mon
371
Tue
379
Wed
369
Thu
443
Fri
461
Sat
439
Sun

Explore More Popular Flights

Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.