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Decatur

$271+ Cheap flights from San Francisco to Decatur, IL (SFO - DEC)

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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — DEC
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
1 adult, Economy
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Cheap flight deals from San Francisco to Decatur

Cheapest flights from San Francisco to Decatur
Explore the most affordable flight options available from San Francisco to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 16, 2026.

This United Airlines deal was found by Cheapflights users on 3/12. 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 4/1811:52 pm
SFO
-
DEC
1 stop7h 06m
United Airlines
Wed 4/229:52 am
DEC
-
SFO
1 stop9h 20m
United Airlines
Deal found 3/12$434
This United Airlines deal was found by Cheapflights users on 3/14. 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 4/2811:52 pm
SFO
-
DEC
1 stop7h 06m
United Airlines
Fri 5/19:42 am
DEC
-
SFO
1 stop25h 29m
United Airlines
Deal found 3/14$504
This United Airlines deal was found by Cheapflights users on 3/14. 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 6/1710:38 pm
SFO
-
DEC
1 stop8h 19m
United Airlines
Fri 6/269:37 am
DEC
-
SFO
1 stop9h 41m
United Airlines
Deal found 3/14$520
This United Airlines deal was found by Cheapflights users on 3/14. 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 6/1710:38 pm
SFO
-
DEC
1 stop8h 19m
United Airlines
Wed 6/249:37 am
DEC
-
SFO
1 stop9h 41m
United Airlines
Deal found 3/14$555
This United Airlines deal was found by Cheapflights users on 3/14. 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 6/166:34 pm
SFO
-
DEC
1 stop21h 22m
United Airlines
Sun 6/289:37 am
DEC
-
SFO
1 stop25h 10m
United Airlines
Deal found 3/14$592

Find flight deals from San Francisco to Decatur

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Decatur (DEC). 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 March 16, 2026.

Round-trip from

$364
(United Airlines)

One-way from

$271
(United Airlines)
From San Francisco to Decatur Arpt
Search Deals
One-way flight from San Francisco to Decatur Arpt
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Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco to Decatur 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 March 16, 2026.
Use the filters below to find and compare flights from San Francisco to Decatur that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Sat 4/18

11:52 pm-8:58 am

1 stop7h 06m

Decatur Arpt

Wed 4/22

7:37 pm-12:39 am

1 stop7h 02m

$454

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Tue 4/28

11:52 pm-8:58 am

1 stop7h 06m

Decatur Arpt

Fri 5/1

7:25 pm-7:32 am

2 stops14h 07m

$552

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Sat 5/9

4:45 pm-8:58 am

2 stops14h 13m

Decatur Arpt

Wed 5/13

7:25 pm-12:50 am

1 stop7h 25m

$552

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Wed 6/17

8:04 am-8:57 am

2 stops22h 53m

Decatur Arpt

Fri 6/26

7:20 pm-12:32 am

1 stop7h 12m

$650
Cheapest one-way

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Sat 4/18

11:52 pm-5:57 pm

1 stop16h 05m

$271
Quickest one-way

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Fri 4/17

10:50 pm-12:54 pm

1 stop12h 04m

$291

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Fri 4/3

6:29 pm-12:54 pm

1 stop16h 25m

$458

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Sat 4/4

10:35 pm-5:57 pm

3 stops17h 22m

$570

San FranciscoDecatur

SFO - DEC

SFODEC

San Francisco

Thu 3/26

12:40 pm-5:53 pm

1 stop27h 13m

$906

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Sorted by cheapest first

Best time to book a flight from San Francisco to Decatur

Have a flexible travel schedule? Discover the best time to fly to Decatur from San Francisco 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 San Francisco to Decatur

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

Currently, May is the cheapest month in which you can book a flight from San Francisco to Decatur, Illinois (average of $269). Flying from San Francisco to Decatur, Illinois in June is currently the most expensive (average of $527). 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 Decatur

Get insights into the airlines that provide service to Decatur. 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 Decatur. Reviews last updated March 16, 2026.
See what other customers who have flown with United Airlines from San Francisco to Decatur 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
9,428 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,428 reviews
United Airlines
7.4
Good
9,428 reviews

Crew

8.1

Entertainment

7.1

Food

6.6

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Decatur. 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 San Francisco to Decatur, Illinois?

    There are many flights that can get you from San Francisco to Decatur, Illinois in 7h 06m. Fly via United Airlines to get the fastest option. The distance between San Francisco and Decatur, Illinois is about 1801 mi.

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

    Cheapflights users have booked flights from San Francisco to Decatur, Illinois round-trip from $349.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from San Francisco to Decatur 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 San Francisco to Decatur, Illinois?

    Currently, May is the cheapest month in which you can book a flight from San Francisco to Decatur, Illinois (average of $269). Flying from San Francisco to Decatur, Illinois in June is currently the most expensive (average of $527). 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 Decatur?

Book flights to Decatur if you plan to visit one of these locations
Mattoon
Effingham

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Alternative routes for San Francisco to Decatur

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Top airline flying from San Francisco to Decatur

Discover the top airline that operate flights from San Francisco to Decatur. 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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$354Average$476FlexibilityNo cancel feeOn-time69%

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