Route guide
Cheap Flights from Chicago to San Francisco: Book Airline Tickets
- Distance
- about 1,840 mi
- Typical flight time
- 4 h – 5 h
- Airports
- 2 × 3
- Time difference
- 2 h behind
This page covers the practical side of flying between Chicago and San Francisco: which airports to compare, how long the trip takes, and when it is busy. It works for either direction. For a price on your dates, ask a specialist.
Quick answer: Chicago to San Francisco is about 1,840 miles (2,960 km) and a typical flight takes 4 h to 5 h. San Francisco is 2 hours behind Chicago. Chicago has 2 airports to compare and San Francisco has 3.
Airport pairs to compare
Chicago has two main airports: O'Hare handles hub and long-haul traffic, while Midway is smaller and closer to the city center. The Bay Area has three major airports, and the best one depends on where you are staying. SFO is the main gateway, with Oakland and San Jose as alternatives.
| Pair | Departure airport | Arrival airport |
|---|---|---|
| ORD to SFO | O'Hare International | San Francisco International |
| ORD to OAK | O'Hare International | Oakland International |
| ORD to SJC | O'Hare International | San Jose Mineta International |
| MDW to SFO | Midway International | San Francisco International |
| MDW to OAK | Midway International | Oakland International |
| MDW to SJC | Midway International | San Jose Mineta International |
About the airports
- ORD · O'Hare International
A major hub for connecting traffic and long-haul flights, with a direct train to downtown. - MDW · Midway International
Closer to downtown and served by its own train line, with a focus on shorter domestic routes. - SFO · San Francisco International
The main airport, south of the city, with a BART connection. - OAK · Oakland International
A good alternative if you are staying in the East Bay or want a smaller airport. - SJC · San Jose Mineta International
A convenient choice for Silicon Valley and the South Bay.
Airlines with a major base at either end
- At Chicago: United Airlines, American Airlines, Southwest Airlines
- At San Francisco: United Airlines, Alaska Airlines
United Airlines has a base at both ends, which can make nonstop service more likely. Schedules change, so a specialist confirms what actually operates on your dates.
When to go and what to expect
Chicago
Late spring through early fall is the most pleasant stretch. Winter brings snow and cold that can cause delays.
San Francisco
Late summer and early fall tend to be the warmest and clearest months. Summer mornings are often foggy.
How long is Chicago to San Francisco?
At about 1,840 miles, Chicago to San Francisco is a long domestic-style flight of several hours. Meal options, seat choice and baggage rules matter more on a trip this long, so compare the full total rather than just the base fare.
Time zones and timing
San Francisco is 2 hours behind Chicago, so you land at a local time 2 hours earlier than departure time plus flight time would suggest. Plan your arrival day around local time at the destination.
Getting between the airport and town
Chicago: CTA trains run from both airports to the city center, which is usually the most predictable option at busy times.
San Francisco: BART trains connect SFO and Oakland to the wider region, which avoids freeway traffic.
Planning ground transport too? See our car rental guide.
Good to know
- Check every airport pairing when you compare fares. Schedules and airline options can differ between them.
- Winter weather is the main source of disruption. Build in extra buffer for connections between November and March.
- Fog can cause delays at SFO, particularly in the morning. Check all three airports when you compare fares.
- Compare the total with bags included, not just the base fare. See baggage fees and taxes and fees.
Flying San Francisco to Chicago?
This route guide works in both directions. For other trips, see all flights from Chicago or all flights from San Francisco.
Frequently asked questions
How far is Chicago from San Francisco?
The straight-line distance between the main airports is about 1,840 miles (2,960 km). Routes can be longer in practice because of air traffic and weather.
How long is a flight from Chicago to San Francisco?
A typical scheduled flight takes roughly 4 h to 5 h in the air, depending on winds, the aircraft and the airports. Connecting itineraries take longer, and nonstop availability depends on the airline and dates.
Which airports can I use?
At Chicago: ORD (O'Hare International), MDW (Midway International). At San Francisco: SFO (San Francisco International), OAK (Oakland International), SJC (San Jose Mineta International). Ask for prices on more than one pairing.
Is there a time difference?
San Francisco is 2 hours behind Chicago.
When is the best time to fly from Chicago to San Francisco?
In Chicago: Late spring through early fall is the most pleasant stretch. Winter brings snow and cold that can cause delays. In San Francisco: Late summer and early fall tend to be the warmest and clearest months. Summer mornings are often foggy. Fares are usually highest in the busy periods described for each city, so flexible dates can help.
Which airlines should I compare for Chicago to San Francisco?
Airlines with a major base at either end include United Airlines, American Airlines, Southwest Airlines and Alaska Airlines. A specialist compares them with other carriers on your dates, since schedules and availability change.
Do you show fares on this page?
No. Fares change constantly, so we do not publish prices that might be out of date. A specialist checks live availability and confirms the full total, including taxes and bags, before you pay.
Route details updated October 18, 2026.