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$289+ Cheap flights from Decatur, IL to San Francisco (DEC - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — SFO
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Decatur to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Decatur (DEC) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$374
(United Airlines)

One-way from

$289
(United Airlines)
From Decatur Arpt to San Francisco
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One-way flight from Decatur Arpt to San Francisco
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Find flight deals from Decatur to San Francisco

Cheapest flights from Decatur to San Francisco
Explore the most affordable flight options available from Decatur to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/49:38 amDEC - SFO
1 stop7h 52mUnited Airlines
Mon 10/611:00 pmSFO - DEC
1 stop7h 51mUnited Airlines
Deal found 9/10$374
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:55 pmDEC - SFO
1 stop16h 01mUnited Airlines
Sat 10/2511:33 pmSFO - DEC
1 stop7h 15mUnited Airlines
Deal found 9/10$404
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:55 pmDEC - SFO
1 stop7h 04mUnited Airlines
Tue 9/304:55 pmSFO - DEC
1 stop13h 56mUnited Airlines
Deal found 9/11$413
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/259:38 amDEC - SFO
1 stop7h 52mUnited Airlines
Mon 9/2911:33 pmSFO - DEC
1 stop7h 18mUnited Airlines
Deal found 9/10$424
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:09 pmDEC - SFO
1 stop6h 54mUnited Airlines
Thu 1/811:56 pmSFO - DEC
1 stop7h 09mUnited Airlines
Deal found 9/11$425
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/159:30 amDEC - SFO
1 stop25h 26mUnited Airlines
Mon 10/2711:44 pmSFO - DEC
1 stop16h 08mUnited Airlines
Deal found 9/10$434
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/39:38 amDEC - SFO
1 stop7h 52mUnited Airlines
Wed 10/84:30 pmSFO - DEC
2 stops14h 21mUnited Airlines
Deal found 9/9$445

Cheapflights Fare Finder

 
Customize your flight search to find flights from Decatur to San Francisco that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Decatur to San Francisco that are best for you.

Fly from

Decatur

Fly to

San Francisco

Route

Depart

Return

Price

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Sat 10/4

9:38 am-3:30 pm

1 stop7h 52m

San Francisco

Mon 10/6

11:33 pm-8:51 am

1 stop7h 18m

$374

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Fri 10/3

9:38 am-3:30 pm

1 stop7h 52m

San Francisco

Wed 10/8

11:33 pm-8:51 am

1 stop7h 18m

$374

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Wed 10/15

6:55 pm-8:56 am

1 stop16h 01m

San Francisco

Sat 10/25

11:33 pm-8:48 am

1 stop7h 15m

$404

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Fri 9/26

6:55 pm-11:59 pm

1 stop7h 04m

San Francisco

Tue 9/30

4:55 pm-8:51 am

1 stop13h 56m

$413

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Fri 12/19

7:09 pm-12:03 am

1 stop6h 54m

San Francisco

Thu 1/8

11:56 pm-9:05 am

1 stop7h 09m

$425

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Fri 3/6

3:20 pm-10:39 pm

1 stop9h 19m

San Francisco

Tue 3/10

11:59 pm-10:51 am

1 stop8h 52m

$425

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Wed 10/15

9:30 am-8:56 am

1 stop25h 26m

San Francisco

Mon 10/27

11:44 pm-5:52 pm

1 stop16h 08m

$434

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Sun 11/9

7:08 pm-4:08 pm

2 stops23h 00m

$289

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Sat 11/22

7:08 pm-9:04 am

1 stop15h 56m

$336

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Tue 11/25

7:08 pm-8:08 pm

1 stop27h 00m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 12 results
1
2

Best time to book a flight from Decatur to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Decatur with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Decatur to San Francisco

What is the cheapest month to book a flight from Decatur, Illinois to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Decatur, Illinois to San Francisco (average of $276). Flying from Decatur, Illinois to San Francisco in June is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Francisco. Reviews last updated September 11, 2025.
See what other customers who have flown with United Airlines from Decatur to San Francisco have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

Find useful and relevant information for your journey from Decatur to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Decatur, Illinois to San Francisco?

    Airlines like United Airlines fly from Decatur, Illinois to San Francisco in about 7h 52m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 1801 mi.

  • What is the cheapest airline to fly from Decatur, Illinois to San Francisco round-trip?

    Flying on United Airlines is currently your cheapest option to San Francisco, with prices starting at $283.

  • Can I find deals for flights from Decatur to San Francisco that include hotel bookings?

    Yes. In addition to deals on Decatur to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Decatur to San Francisco?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Decatur to San Francisco.

  • Can I find deals for business class flights from Decatur to San Francisco?

    Yes. Cheapflights offers flight deals from Decatur to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Decatur, Illinois to San Francisco?

    Currently, January is the cheapest month in which you can book a flight from Decatur, Illinois to San Francisco (average of $276). Flying from Decatur, Illinois to San Francisco in June is currently the most expensive (average of $357). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Roseville
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Manteca
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San Mateo
Lathrop

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Top airline flying from Decatur to San Francisco

Discover the top airline that operate flights from Decatur to San Francisco. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$283Average$383FlexibilityNo cancel feeOn-time69%

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