$45 Find Cheap Flights from Illinois to San Francisco Bay Area

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Useful Info

Good to know

Low seasonFebruary
High seasonAugust
Cheapest flight$45
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from Chicago O'Hare Airport to Oakland

FAQs for booking flights from Illinois to San Francisco Bay Area

  • How does KAYAK find such low prices on flights from Illinois to San Francisco Bay Area?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to San Francisco Bay Area.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to San Francisco Bay Area?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to San Francisco Bay Area is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to San Francisco Bay Area?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Illinois to San Francisco Bay Area with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to San Francisco Bay Area?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Illinois to San Francisco Bay Area up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in San Francisco Bay Area?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in San Francisco Bay Area is San Francisco Airport (SFO), with an average flight price of $206.

  • What is the cheapest day to fly to San Francisco Bay Area?

    Based on KAYAK data, the cheapest day to fly to San Francisco Bay Area is Thursday where round-trip tickets can be as cheap as $359. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $529 on average.

  • What is the cheapest time of day to fly to San Francisco Bay Area?

    The cheapest time of day to fly to San Francisco Bay Area is generally at night, when round-trip flights cost $387 on average. Morning departures are around 14% cheaper than evening flights, on average. The most expensive time of day to fly to San Francisco Bay Area is generally in the evening, which is peak travel time and where the average cost of a ticket is $461.

  • What is the cheapest flight to San Francisco Bay Area?

    The cheapest ticket to San Francisco Bay Area from Illinois found in the last 72 hours was to San Francisco, at $122 round-trip. The most popular route is Chicago Midway Airport (MDW) to San Francisco (SFO) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $122.

  • What is the cheapest month to fly from Illinois to San Francisco Bay Area?

    The cheapest month for flights from Illinois to San Francisco Bay Area is September, when tickets cost $196 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $512 and $472 respectively.

  • How far in advance should I book a flight from Illinois to San Francisco Bay Area?

    To get a below average price on the flight from Illinois to San Francisco Bay Area, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

  • How long is the flight to San Francisco Bay Area?

    An average nonstop flight from Illinois to San Francisco Bay Area takes 9h 37m, covering a distance of 1772 miles. The shortest route is St. Louis (STL) to San Francisco (SFO) with an average flight time of 4h 10m.

  • What are the most popular destinations in San Francisco Bay Area?

    Based on KAYAK flight searches, the most popular destination is San Francisco (75% of total searches to San Francisco Bay Area). The next most popular destinations are Oakland (14%) and San Jose (11%). Searches for flights to Santa Rosa (1%) are also popular.

Book cheap flights from Illinois to San Francisco Bay Area

Recent round-trip flight deals

7/17Thu
1 stopSpirit Airlines
6h 39mORD-OAK
7/21Mon
1 stopSpirit Airlines
6h 13mOAK-ORD
$162
7/3Thu
2 stopsSpirit Airlines
13h 21mORD-OAK
7/8Tue
1 stopSpirit Airlines
6h 25mOAK-ORD
$170
8/21Thu
nonstopSouthwest
4h 35mMDW-SFO
8/26Tue
nonstopSouthwest
4h 10mSFO-MDW
$179
7/1Tue
nonstopUnited Airlines
4h 42mORD-SFO
7/4Fri
nonstopUnited Airlines
4h 23mSFO-ORD
$179
8/31Sun
nonstopUnited Airlines
4h 46mORD-SFO
9/6Sat
nonstopUnited Airlines
4h 18mSFO-ORD
$188
7/10Thu
1 stop
7h 42mORD-SJC
7/14Mon
1 stop
5h 43mSJC-ORD
$195
7/9Wed
1 stopFrontier
18h 25mORD-SFO
7/14Mon
1 stopFrontier
9h 56mSFO-ORD
$196
8/26Tue
nonstopSouthwest
4h 35mMDW-SFO
8/27Wed
nonstopSouthwest
4h 10mSFO-MDW
$197
6/30Mon
1 stopFrontier
7h 54mMDW-SFO
7/9Wed
1 stopFrontier
11h 59mSFO-MDW
$200
7/9Wed
1 stop
10h 36mORD-SJC
7/13Sun
1 stop
9h 52mSJC-ORD
$200

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Recent one-way flight deals

9/24Wed
1 stopSpirit Airlines
10h 18mORD-OAK
$45
8/24Sun
2 stopsSpirit Airlines
17h 19mORD-OAK
$74
11/4Tue
nonstopSouthwest
4h 45mMDW-SFO
$90
7/2Wed
nonstopUnited Airlines
4h 50mORD-SFO
$90
7/4Fri
nonstopAmerican Airlines
4h 38mORD-SFO
$91
8/12Tue
nonstopSouthwest
4h 35mMDW-SFO
$99
8/19Tue
nonstopHawaiian Airlines
4h 48mORD-SFO
$99
11/5Wed
1 stopHawaiian Airlines
10h 37mORD-OAK
$104
7/2Wed
nonstopUnited Airlines
4h 39mORD-SFO
$135
9/10Wed
1 stopAmerican Airlines
11h 08mSTL-SFO
$144

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Last minute flights from Illinois to San Francisco Bay Area

Last minute flight, train and bus deals

6/21Sat
multi-stopFrontier
18h 34mORD-SFO
7/10Thu
multi-stopFrontier
15h 33mSFO-ORD
$258
6/21Sat
multi-stopFrontier
15h 07mMDW-SFO
8/16Sat
multi-stopFrontier
16h 13mSFO-MDW
$319
6/23Mon
multi-stopSouthwest
8h 00mORD-SFO
6/30Mon
multi-stopSouthwest
6h 30mSFO-ORD
$347
6/23Mon
multi-stopSouthwest
10h 35mORD-SFO
6/30Mon
multi-stopSouthwest
6h 30mSFO-ORD
$353
6/22Sun
multi-stopSpirit Airlines
13h 51mORD-SJC
6/24Tue
multi-stopSpirit Airlines
26h 50mSJC-ORD
$399
6/21Sat
multi-stop
18h 34mORD-SFO
8/16Sat
multi-stop
20h 56mSFO-ORD
$404
6/23Mon
multi-stopAmerican Airlines
6h 59mORD-SFO
6/26Thu
nonstopAmerican Airlines
4h 20mSFO-ORD
$407
6/19Thu
nonstopAmerican Airlines
4h 52mORD-SFO
1/13Tue
nonstopAmerican Airlines
4h 16mSFO-ORD
$408
6/20Fri
nonstop
4h 48mORD-SFO
7/1Tue
multi-stop
11h 24mSFO-ORD
$415
6/22Sun
multi-stopSpirit Airlines
13h 51mORD-SJC
6/24Tue
multi-stopSpirit Airlines
28h 38mSJC-ORD
$444

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Everything you need to know for your flight to San Francisco Bay Area

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to San Francisco Bay Areafrom $279
Business Class flights to San Francisco Bay Areafrom $285
Prem Econ Class flights to San Francisco Bay Areafrom $108
Economy Class flights to San Francisco Bay Areafrom $25

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