The cheapest times to fly from IAD to SFO are

  • January 8th to March 4th
  • April 16th to May 6th
  • August 13th to November 18th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from IAD to SFO is late October to early November. Prices can be as high as $1078 for Sunday flights during late July, or as low as $305 for Tuesday flights around late October to early November.


When to Fly to San Francisco

Flying from Washington, DC (IAD) to San Francisco, CA (SFO) will usually cost between $347 to $534 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October to early November with an average ticket price of $358. Due to high demand the most expensive time to fly is late July, with an average price of $549. Planning your trip to low-cost times can easily save you $191 on economy flights and even more on first-class flights. Generally, any price below $424 can be considered a good price for a round-trip IAD to SFO flight.

See below for a graph of average weekly prices for the IAD to SFO route. All prices are for round-trip tickets in USD.

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IAD to SFO Flight Prices

Compared to other flights, the IAD to SFO flight is much cheaper than the average and costs much less than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.11, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $75 (16%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $391. Return trip prices are from the SFO to IAD flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

[wp_charts colors=”F38630″ scaleoverride=”true” scalesteps=”5″ scalestepwidth=”100″ scalestartvalue=”0″ title=”IAD to SFO prices by departure day of the week” width=”90%” type=”bar” align=”aligncenter” margin=”5px 20px” datasets=”466,421,391,391,449,444,432″ labels=”Sun,Mon,Tue,Wed,Thu,Fri,Sat”]

Departure Day Prices

Return Trip Prices by Day

[wp_charts colors=”F38630″ scaleoverride=”true” scalesteps=”5″ scalestepwidth=”100″ scalestartvalue=”0″ title=”IAD to SFO prices by returning day of the week” width=”90%” type=”bar” align=”aligncenter” margin=”5px 20px” datasets=”466,419,391,391,452,442,432″ labels=”Sun,Mon,Tue,Wed,Thu,Fri,Sat”]

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from IAD to SFO can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 5 hour 19 minutes may be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from IAD to SFO while comparing.

Destination alternative #1: Sacramento International Airport (SMF) in Sacramento, CA

  • 86 miles (138 km) away from SFO
  • Usually 5.42% less expensive than SFO
  • Nonstop flights available

See IAD to SMF flights

Destination alternative #2: Norman Y. Mineta San Jose International Airport (SJC) in San Jose, CA

  • 30 miles (48 km) away from SFO
  • Usually 4.95% less expensive than SFO
  • 1-layover flights available

See IAD to SJC flights


Flight Questions Answered

Still have questions about flying from IAD to SFO? We’ve got answers.

Which airlines fly this route?

You can find 10 major airlines flying this route most often: Alaska, American, Delta, Fiji Airways, Frontier, Qantas, Singapore Airlines, Southwest, Sun Country Airlines, United, and potentially more during busy seasons.

How far away is it from San Francisco International Airport to Washington Dulles International Airport?

The distance between the two airports is roughly 2412 miles or 3882 kilometers.

How long does it take to fly from IAD to SFO?

The real-world flight time for a nonstop IAD to SFO flight is about 5 hour 19 minutes.

How many flights go between Washington, DC and San Francisco, CA?

It depends on the day of the week and the date, but a typical day might have around 76 available flights from IAD to SFO.


Airport Location Info


Departing Airport

Origination code IAD
Origination airport name Washington Dulles International Airport
City Washington, DC
Country the United States
Latitude 38.9
Longitude -77.5

Return Airport

Destination code SFO
Destination airport name San Francisco International Airport
City San Francisco, CA
Country the United States
Latitude 37.6
Longitude -122.4


Late and Early Flight Data

Flights from IAD to SFO tend to depart as late as the average flight. According to our recently updated data, 30% of flights departed 5 or more minutes late, and 15% of flights left 5 or more minutes early. On average you can expect to leave SFO heading for IAD about 18 minutes late. This does significantly impact arrival time, as the average landing time in San Francisco, CA is about 9 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:

  • United: 18 minutes late
  • Alaska: 18 minutes late
  • Some airlines not reporting


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.