The cheapest times to fly from SJC to SDY are

  • January 1st to March 11th
  • August 20th to November 18th
  • early December

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 SJC to SDY is late October to early November. Prices can be as high as $903 for Sunday flights during mid December, or as low as $346 for Tuesday flights around late October to early November.


When to Fly to Sidney

Flying from San Jose, CA (SJC) to Sidney, MT (SDY) will usually cost between $394 to $697 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 $435. Due to high demand the most expensive time to fly is mid December, with an average price of $690. Planning your trip to low-cost times can easily save you $254 on economy flights and even more on first-class flights. Generally, any price below $549 can be considered a good price for a round-trip SJC to SDY flight.

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

SJC to SDY Flight Prices

Compared to other flights, the SJC to SDY flight is cheaper than the average and costs much less than the average flight leaving from San Jose. The average price per mile (for a direct flight) is $0.3, which is in the normal range for a flight.


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 $152 (24%) 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 $485. Return trip prices are from the SDY to SJC 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 SJC to SDY can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 3 hour 3 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 SJC to SDY while comparing.

Destination alternative #1: Minot International Airport (MOT) in Minot, ND

  • 140 miles (225 km) away from SDY
  • Usually 23.68% less expensive than SDY
  • 1-layover flights available

See SJC to MOT flights

Destination alternative #2: L. M. Clayton Airport (OLF) in Wolf Point, MT

  • 69 miles (111 km) away from SDY
  • Usually 2.19% less expensive than SDY
  • 2-layover flights available

See SJC to OLF flights

Destination alternative #3: Wokal Field/Glasgow International Airport (GGW) in Glasgow, MT

  • 117 miles (188 km) away from SDY
  • Usually 1.64% less expensive than SDY
  • 2-layover flights available

See SJC to GGW flights


Flight Hacking SJC to SDY

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 SJC to SDY — but Champion Traveler does!

Hack #1: Billings, MT (SJC > BIL > SDY)

  • Price for both tickets: $360
  • Average savings: $189 (34.43%)

See SJC to BIL flights


Flight Questions Answered

Still have questions about flying from SJC to SDY? We’ve got answers.

Which airlines fly this route?

You can find 6 major airlines flying this route most often: Alaska, American, Cape Air, Delta, Frontier, United, and potentially more during busy seasons.

How far away is it from Sidney Richland Regional Airport to Norman Y. Mineta San Jose International Airport?

The distance between the two airports is roughly 1147 miles or 1846 kilometers.

How long does it take to fly from SJC to SDY?

The real-world flight time for a nonstop SJC to SDY flight is about 3 hour 3 minutes.

How many flights go between San Jose, CA and Sidney, MT?

It depends on the day of the week and the date, but a typical day might have around 15 available flights from SJC to SDY.


Airport Location Info


Departing Airport

Origination codeSJC
Origination airport nameNorman Y. Mineta San Jose International Airport
CitySan Jose, CA
Countrythe United States

Return Airport

Destination codeSDY
Destination airport nameSidney Richland Regional Airport
CitySidney, MT
Countrythe United States


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.