The cheapest times to fly from ACK to SFO are

  • January 8th to March 18th
  • June 25th to November 11th (except the weeks of July 2nd, July 23rd, July 30th, and October 22nd)

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 ACK to SFO is late August to early September. Prices can be as high as $1643 for Sunday flights during early to mid May, or as low as $315 for Tuesday flights around late August to early September.


When to Fly to San Francisco

Flying from Nantucket, MA (ACK) to San Francisco, CA (SFO) will usually cost between $430 to $1165 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late August to early September with an average ticket price of $436. Due to high demand the most expensive time to fly is early to mid May, with an average price of $1192. Planning your trip to low-cost times can easily save you $756 on economy flights and even more on first-class flights. Generally, any price below $809 can be considered a good price for a round-trip ACK to SFO flight.

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

ACK to SFO Flight Prices

Compared to other flights, the ACK to SFO flight is cheaper than the average and costs less than the average flight leaving from Nantucket. The average price per mile (for a direct flight) is $0.18, which is 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 $154 (17%) 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 $763. Return trip prices are from the SFO to ACK 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 ACK to SFO can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 5 hour 57 minutes may not 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 not usually a nonstop flight from ACK to SFO while comparing.

Destination alternative #1: Norman Y. Mineta San Jose International Airport (SJC) in San Jose, CA

  • 30 miles (48 km) away from SFO
  • Usually 2.60% less expensive than SFO
  • 1-layover flights available

See ACK to SJC flights


Flight Hacking ACK to SFO

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from ACK to SFO — but Champion Traveler does!

Hack #1: Boston, MA (ACK > BOS > SFO)

  • Price for both tickets: $705
  • Average savings: $104 (12.86%)

See ACK to BOS flights

Hack #2: New York, NY (ACK > JFK > SFO)

  • Price for both tickets: $808
  • Average savings: $2 (0.19%)

See ACK to JFK flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 8 major airlines flying this route most often: Alaska, American, Cape Air, Delta, Hawaiian, JetBlue, Qatar Airways, United, and potentially more during busy seasons.

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

The distance between the two airports is roughly 2760 miles or 4442 kilometers.

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

The real-world flight time for a nonstop ACK to SFO flight is about 5 hour 57 minutes.

How many flights go between Nantucket, MA and San Francisco, CA?

It depends on the day of the week and the date, but a typical day might have around 21 available flights from ACK to SFO.


Airport Location Info


Departing Airport

Origination code ACK
Origination airport name Nantucket Memorial Airport
City Nantucket, MA
Country the United States
Latitude 41.3
Longitude -70.1

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


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.