The cheapest times to fly from FRA to SDY are

  • March 26th to April 22nd
  • May 7th to June 3rd
  • October 15th to February 25th (except the week of 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 FRA to SDY is early February. Prices can be as high as $6812 for Monday flights during early to mid August, or as low as $3649 for Sunday flights around early February.


When to Fly to Sidney

Flying from Frankfurt (FRA) to Sidney, MT (SDY) will usually cost between $3872 to $6812 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early February with an average ticket price of $3921. Due to high demand the most expensive time to fly is early to mid August, with an average price of $6812. Planning your trip to low-cost times can easily save you $2891 on economy flights and even more on first-class flights. Generally, any price below $4958 can be considered a good price for a round-trip FRA to SDY flight.

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

FRA to SDY Flight Prices

Compared to other flights, the FRA to SDY flight is more expensive than the average and costs more than the average flight leaving from Frankfurt. The average price per mile (for a direct flight) is $0.67, which is above average.


Flight Prices by Day of the Week

Sunday is usually the cheapest day to fly to SDY, and Monday the cheapest day to fly back into FRA. Mondays are the most expensive days to fly to Sidney, and Thursdays are the most expensive days to return to Frankfurt. Selecting flights on the least expensive days could save you up to $368 (7%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Sunday and returning a week later will cost an average of $4729. Return trip prices are from the SDY to FRA 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 FRA 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 9 hour 15 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 FRA to SDY while comparing.

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

  • 140 miles (225 km) away from SDY
  • Usually 78.23% less expensive than SDY
  • 1-layover flights available

See FRA to MOT flights


Flight Hacking FRA 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 FRA to SDY — but Champion Traveler does!

Hack #1: San Francisco, CA (FRA > SFO > SDY)

  • Price for both tickets: $1089
  • Average savings: $3870 (78.05%)

See FRA to BIL flights

Hack #2: Billings, MT (FRA > BIL > SDY)

  • Price for both tickets: $1114
  • Average savings: $3844 (77.53%)

See FRA to SFO flights

Hack #3: Los Angeles, CA (FRA > LAX > SDY)

  • Price for both tickets: $1146
  • Average savings: $3813 (76.9%)

See FRA to LAX flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 10 major airlines flying this route most often: Air France, Alaska, American, British Airways, Cape Air, Delta, Icelandair, KLM, Lufthansa, United, and potentially more during busy seasons.

How far away is it from Sidney Richland Regional Airport to Frankfurt Main Airport?

The distance between the two airports is roughly 4590 miles or 7387 kilometers.

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

The real-world flight time for a nonstop FRA to SDY flight is about 9 hour 15 minutes.

How many flights go between Frankfurt and Sidney, MT?

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


Airport Location Info


Departing Airport

Origination code FRA
Origination airport name Frankfurt Main Airport
City Frankfurt
Country Germany
Latitude 50
Longitude 8.6

Return Airport

Destination code SDY
Destination airport name Sidney Richland Regional Airport
City Sidney, MT
Country the United States
Latitude 47.7
Longitude -104.2


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.