The cheapest times to fly from SDY to CDG are

  • February 5th to March 4th
  • late May to early June
  • October 8th to December 31st

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 SDY to CDG is early December. Prices can be as high as $6445 for Tuesday flights during early January, or as low as $958 for Saturday flights around early December.


When to Fly to Paris

Flying from Sidney, MT (SDY) to Paris (CDG) will usually cost between $1009 to $5886 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early December with an average ticket price of $1001. Due to high demand the most expensive time to fly is early January, with an average price of $5919. Planning your trip to low-cost times can easily save you $4918 on economy flights and even more on first-class flights. Generally, any price below $5786 can be considered a good price for a round-trip SDY to CDG flight.

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

SDY to CDG Flight Prices

Compared to other flights, the SDY to CDG flight is more expensive than the average and costs more than the average flight leaving from Sidney. The average price per mile (for a direct flight) is $0.81, which is above average.


Flight Prices by Day of the Week

Saturday is usually the cheapest day to fly to CDG, and Thursday the cheapest day to fly back into SDY. Tuesdays are the most expensive days to fly to Paris, and Mondays are the most expensive days to return to Sidney. Selecting flights on the least expensive days could save you up to $1059 (16%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Saturday and returning a week later will cost an average of $3770. Return trip prices are from the CDG to SDY 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 SDY to CDG can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 8 hour 60 minutes may not be realistic.


Flight Hacking SDY to CDG

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 SDY to CDG — but Champion Traveler does!

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

  • Price for both tickets: $1014
  • Average savings: $4772 (82.47%)

See SDY to SFO flights

Hack #2: San Jose, CA (SDY > SJC > CDG)

  • Price for both tickets: $1039
  • Average savings: $4747 (82.04%)

See SDY to SJC flights

Hack #3: Boston, MA (SDY > BOS > CDG)

  • Price for both tickets: $1096
  • Average savings: $4691 (81.07%)

See SDY to BOS flights


Flight Questions Answered

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

Which airlines fly this route?

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

How far away is it from Paris Charles de Gaulle Airport to Sidney Richland Regional Airport?

The distance between the two airports is roughly 4453 miles or 7166 kilometers.

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

The real-world flight time for a nonstop SDY to CDG flight is about 8 hour 60 minutes.

How many flights go between Sidney, MT and Paris?

It depends on the day of the week and the date, but a typical day might have around 6 available flights from SDY to CDG.


Airport Location Info


Departing Airport

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

Return Airport

Destination codeCDG
Destination airport nameParis Charles de Gaulle Airport


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.