Cheap Flights from San Diego (SDM) to Sidney (SDY)

Popular airlines from San Diego, CA (SDM-Brown Field Municipal) to Sidney, MT (SDY-Sidney-Richland Municipal)

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Frequently asked questions

How much does a flight from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY) cost?
Get a cheap one-way flight or cheap return flight from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY)?
is the least expensive month to fly from SDM to SDY. Planning your trip for the off-season is often the key to better flight prices.
What is the cheapest airline that flies from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from SDM to SDY. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY)?
Nonstop flights from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SDM to SDY?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a range of factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY)?
Choose a flight from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY) that leaves before 3 PM to reduce the risk of cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY) last-minute?
Last-minute bookings from SDM to SDY are usually more expensive. For the lowest prices, start looking for flights as early as possible. That being said, if you're flexible with your travel plans, it's possible to land a cheap fare right before your trip.
Is it cheaper to book a SDM to SDY flight and hotel package?
Opting for a SDM to SDY flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our extensive range of hotels and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Diego, CA (SDM-Brown Field Municipal) to Sidney-Richland Municipal Airport (SDY)?
Usually, it's possible to cancel or reschedule your SDM to SDY flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Brown Field Municipal
Destination airport
Sidney-Richland Municipal
Distance
1241 mi

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San Diego to Sidney Flights

The cheapest times to fly from San Diego to Sidney

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Diego to Sidney are during the month of . You can find some of the cheapest flights from San Diego to Sidney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Diego to Sidney

Sunday is one of the best days to book for cheap flights from San Diego to Sidney: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Diego to Sidney

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Diego to Sidney in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Diego to Sidney flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Diego to Sidney airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Diego to Sidney Flights

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