What is the cheapest airline to fly from Champaign to San Francisco round-trip?

American Airlines, at $378, was found to be the cheapest airline from Champaign to San Francisco.. Users have found that American Airlines is 33% cheaper than the other options available to this destination.

What is the cheapest day to fly from Champaign to San Francisco?

Travelers seeking maximum savings on their Champaign to San Francisco flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What is the cheapest day to fly round-trip from Champaign to San Francisco?

Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 36% when planning your travel around this day of the week.

What is the cheapest month to fly from Champaign to San Francisco?

Our data shows that September tends to be the cheapest month to fly to San Francisco from Champaign. Users have commonly found prices around $568 for the month, but tickets can be as low as $235. Due to multiple factors, prepare for potentially higher prices in January.

What is the cheapest time of day to fly from CMI to SFO?

When flying from Champaign to San Francisco, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 8% versus a flight at noon.

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

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

How can I find direct flights from Champaign to San Francisco?

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

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

Yes. Cheapflights offers flight deals from Champaign 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.

$261+ Flights from Champaign to San Francisco

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Cheap flight deals from Champaign to San Francisco

Round-trip from	$378 (American Airlines)
One-way from	$261 (American Airlines)
Popular in	January
Cheapest in	September
Average price	$593

From Champaign University-Willard to San Francisco

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One-way flight from Champaign University-Willard to San Francisco

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Highest demand for flights based on searches. 14% potential increase in price ($96 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Cheapest flights from Champaign to San Francisco
Explore the most affordable flight options available from Champaign to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Tue 7/292:51 pmCMI - SFO

1 stop8h 38mAmerican Airlines

Tue 8/511:18 amSFO - CMI

1 stop7h 26mAmerican Airlines

Deal found 6/29

$378

Best flights from Champaign to San Francisco
Discover carefully curated flight deals from Champaign to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 1, 2025.

Tue 7/292:51 pmCMI - SFO

1 stop8h 38mAmerican Airlines

Tue 8/511:18 amSFO - CMI

1 stop7h 26mAmerican Airlines

Deal found 6/29

$378

Last-minute flights from Champaign to San Francisco
Discover last-minute flight deals from Champaign to San Francisco. Data last updated July 1, 2025 and is based on user searches.

Tue 7/292:51 pmCMI - SFO

1 stop8h 38mAmerican Airlines

Tue 8/511:18 amSFO - CMI

1 stop7h 26mAmerican Airlines

Deal found 6/29

$378

One-way flights from Champaign to San Francisco
Search for one-way flight options from Champaign to San Francisco. Find affordable one-way fares based on user searches. Data last updated July 1, 2025.

Fri 8/223:46 pmCMI - SFO

1 stop9h 06mAmerican Airlines

Deal found 6/30

$261

Cheapflights Fare Finder

Use the filters below to find and compare flights from Champaign to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChampaignSan Francisco

CMI - SFO

CMISFO

Champaign University-Willard

Tue 7/29

2:51 pm-9:29 pm

1 stop8h 38m

San Francisco

Tue 8/5

11:18 am-8:44 pm

1 stop7h 26m

$378

ChampaignSan Francisco

CMI - SFO

CMISFO

Champaign University-Willard

Fri 8/22

3:46 pm-10:52 pm

1 stop9h 06m

$261

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from Champaign to San Francisco

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

What is the cheapest month to book a flight from Champaign to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Champaign to San Francisco (average of $276). Flying from Champaign to San Francisco in June is currently the most expensive (average of $360). 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.

How much does it cost to fly round-trip from Champaign to San Francisco?

Reviews of airlines servicing San Francisco

Get a feel of what it's like to fly with American Airlines from Champaign to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

American Airlines

7.2

Good

10,000 reviews

Reviews

1 / 20

8.0

Excellent

Diana,Jul 2024

ORD - IND

Shout out to Isabelle and Debbie who went above and beyond to make it a good experience. Wheelchair service and workers were excellent and much appreciated.

American Airlines

7.2

Good

10,000 reviews

American Airlines

7.2

Good

10,000 reviews

Reviews

1 / 20

8.0

Excellent

Diana,Jul 2024

ORD - IND

Shout out to Isabelle and Debbie who went above and beyond to make it a good experience. Wheelchair service and workers were excellent and much appreciated.

Related info for your journey

What is the cheapest airline to fly from Champaign to San Francisco round-trip?
American Airlines, at $378, was found to be the cheapest airline from Champaign to San Francisco.. Users have found that American Airlines is 33% cheaper than the other options available to this destination.
Can I find deals for flights from Champaign to San Francisco that include hotel bookings?
Yes. In addition to deals on Champaign to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Champaign to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Champaign to San Francisco.
Can I find deals for business class flights from Champaign to San Francisco?
Yes. Cheapflights offers flight deals from Champaign 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 Champaign to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Champaign to San Francisco (average of $276). Flying from Champaign to San Francisco in June is currently the most expensive (average of $360). 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.

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Top airline flying from Champaign to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$218	Average$559	FlexibilityNo cancel fee	On-time71%

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$261+ Cheap flights from Champaign to San Francisco (CMI - 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Champaign to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Champaign to San Francisco

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Champaign to San Francisco

Cheapest flights from Champaign to San FranciscoExplore the most affordable flight options available from Champaign to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Explore the most affordable flight options available from Champaign to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Champaign to San Francisco that are best for you.

Best time to book a flight from Champaign to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Champaign with our price prediction graph.

Cheapflights Insights

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

What is the cheapest month to book a flight from Champaign to San Francisco?

How much does it cost to fly round-trip from Champaign to San Francisco?

Reviews of airlines servicing San Francisco

Get a feel of what it's like to fly with American Airlines from Champaign to San Francisco by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What is the cheapest airline to fly from Champaign to San Francisco round-trip?

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

How can I find direct flights from Champaign to San Francisco?

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

What is the cheapest month to book a flight from Champaign to San Francisco?

Traveling to a place near Champaign?

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Alternative routes for Champaign to San Francisco

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Top airline flying from Champaign to San Francisco

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Cheapest flights from Champaign to San Francisco
Explore the most affordable flight options available from Champaign to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.