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$374+ Cheap flights from Decatur, IL to San Francisco (DEC - SFO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — SFO
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
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 October 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$374
(United Airlines)
Provider with most accurate pricing for Decatur Arpt-San Francisco flight deals.
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Provider most trusted by Cheapflights users for Decatur Arpt-San Francisco flights.
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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 October 28, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. 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 11/149:44 amDEC - SFO
1 stop9h 44mUnited Airlines
Mon 11/176:57 pmSFO - DEC
2 stops20h 55mUnited Airlines
Deal found 10/27$482
This United Airlines deal was found by Cheapflights users on 10/26. 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.
Tue 11/117:08 pmDEC - SFO
2 stops16h 27mUnited Airlines
Sat 11/1510:40 pmSFO - DEC
1 stop8h 08mUnited Airlines
Deal found 10/26$522
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Mon 11/249:44 amDEC - SFO
1 stop12h 24mUnited Airlines
Mon 12/16:00 amSFO - DEC
1 stop9h 52mUnited Airlines
Deal found 10/28$547
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Tue 11/257:08 pmDEC - SFO
1 stop15h 56mUnited Airlines
Mon 12/16:00 amSFO - DEC
1 stop9h 52mUnited Airlines
Deal found 10/28$624

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 October 28, 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

Fri 3/6

7:09 pm-11:54 pm

1 stop6h 45m

San Francisco

Tue 3/10

10:50 pm-8:52 am

1 stop8h 02m

$374

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Fri 11/14

9:44 am-5:28 pm

1 stop9h 44m

San Francisco

Mon 11/17

6:57 pm-5:52 pm

2 stops20h 55m

$482

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Tue 11/11

7:08 pm-9:35 am

2 stops16h 27m

San Francisco

Sat 11/15

10:40 pm-8:48 am

1 stop8h 08m

$522

DecaturSan Francisco

DEC - SFO

DECSFO

Decatur Arpt

Sun 11/9

7:08 pm-7:36 pm

2 stops26h 28m

$383

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

  • Most accurate provider: When it comes to deals on Decatur, Illinois-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Decatur, Illinois-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Decatur, Illinois-San Francisco flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Decatur, Illinois-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Decatur, Illinois-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, December is the cheapest month in which you can book a flight from Decatur, Illinois to San Francisco (average of $228). Flying from Decatur, Illinois to San Francisco in April is currently the most expensive (average of $376). 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 October 28, 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
9,001 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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
9,001 reviews
United Airlines
7.4
Good
9,001 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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 6h 45m. 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 $284.

  • 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, December is the cheapest month in which you can book a flight from Decatur, Illinois to San Francisco (average of $228). Flying from Decatur, Illinois to San Francisco in April is currently the most expensive (average of $376). 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
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Antioch
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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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$284Average$437FlexibilityNo cancel feeOn-time69%

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