The cheapest times to fly from SUN to SFO are

  • April 16th to May 6th
  • May 21st to July 1st (except the week of June 18th)
  • August 6th to November 25th

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 SUN to SFO is late October to early November. Prices can be as high as $930 for Sunday flights during early to mid May, or as low as $283 for Tuesday flights around late October to early November.


When to Fly to San Francisco

Flying from Sun Valley/Hailey/Ketchum, ID (SUN) to San Francisco, CA (SFO) will usually cost between $303 to $569 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 $316. Due to high demand the most expensive time to fly is early to mid May, with an average price of $530. Planning your trip to low-cost times can easily save you $214 on economy flights and even more on first-class flights. Generally, any price below $395 can be considered a good price for a round-trip SUN to SFO flight.

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

SUN to SFO Flight Prices

Compared to other flights, the SUN to SFO flight is much cheaper than the average and costs much less than the average flight leaving from Sun Valley. The average price per mile (for a direct flight) is $0.42, which is a bit above 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 $120 (25%) 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 $354. Return trip prices are from the SFO to SUN flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from SUN to SFO can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 2 hour 2 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 SUN to SFO while comparing.

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

  • 86 miles (138 km) away from SFO
  • Usually 12.35% less expensive than SFO
  • 1-layover flights available

See SUN 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 9.31% less expensive than SFO
  • 1-layover flights available

See SUN to SJC flights

Destination alternative #3: Metropolitan Oakland International Airport (OAK) in Oakland, CA

  • 11 miles (18 km) away from SFO
  • Usually 7.28% less expensive than SFO
  • 1-layover flights available

See SUN to OAK flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 4 major airlines flying this route most often: Alaska, American, Delta, United, and potentially more during busy seasons.

How far away is it from San Francisco International Airport to Friedman Memorial Airport?

The distance between the two airports is roughly 587 miles or 945 kilometers.

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

The real-world flight time for a nonstop SUN to SFO flight is about 2 hour 2 minutes.

How many flights go between Sun Valley/Hailey/Ketchum, ID and San Francisco, CA?

It depends on the day of the week and the date, but a typical day might have around 78 available flights from SUN to SFO.


Airport Location Info


Departing Airport

Origination codeSUN
Origination airport nameFriedman Memorial Airport
CitySun Valley/Hailey/Ketchum, ID
Countrythe United States

Return Airport

Destination codeSFO
Destination airport nameSan Francisco International Airport
CitySan Francisco, CA
Countrythe United States


Late and Early Flight Data

Flights from SUN to SFO tend to depart much later than the average flight. According to our recently updated data, 42% of flights departed 5 or more minutes late, and 45% of flights left 5 or more minutes early. On average you can expect to leave SFO heading for SUN about 29 minutes late. This does significantly impact arrival time, as the average landing time in San Francisco, CA is about 29 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:

  • SkyWest: 29 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.