$258 Cheap Flights from Boston (BOS) to Sidney (SDY)

View $258 flight on Sat, Oct 31, 2026Opens in a new window

Popular airlines from Logan International Airport (BOS) to Sidney, MT (SDY-Sidney-Richland Municipal)

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Cheap Flights from Boston to Sidney (BOS-SDY)

Prices were available within the past 7 days and start at $258 for one-way flights and $516 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Oct 1 - Sat, Oct 17
BOS
Boston
SDY
Sidney
$516 Roundtrip, found 6 days ago
$516
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Oct 1 from Boston to Sidney, returning Sat, Oct 17, priced at $516 found 6 days ago
American Airlines
Sat, Oct 31 - Wed, Nov 11
BOS
Boston
SDY
Sidney
$519 Roundtrip, found 15 hours ago
$519
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Sat, Oct 31 from Boston to Sidney, returning Wed, Nov 11, priced at $519 found 15 hours ago
Alaska Airlines
Sat, Oct 31 - Wed, Nov 11
BOS
Boston
SDY
Sidney
$524 Roundtrip, found 15 hours ago
$524
Roundtrip
found 15 hours ago
Select Alaska Airlines flight, departing Sat, Oct 31 from Boston to Sidney, returning Wed, Nov 11, priced at $524 found 15 hours ago
American Airlines
Sat, Oct 31 - Wed, Nov 11
BOS
Boston
SDY
Sidney
$526 Roundtrip, found 15 hours ago
$526
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Sat, Oct 31 from Boston to Sidney, returning Wed, Nov 11, priced at $526 found 15 hours ago
Alaska Airlines
Sat, Oct 31 - Wed, Nov 11
BOS
Boston
SDY
Sidney
$529 Roundtrip, found 2 days ago
$529
Roundtrip
found 2 days ago
Select Alaska Airlines flight, departing Sat, Oct 31 from Boston to Sidney, returning Wed, Nov 11, priced at $529 found 2 days ago
United
Sat, Oct 31 - Wed, Nov 11
BOS
Boston
SDY
Sidney
$531 Roundtrip, found 2 days ago
$531
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 31 from Boston to Sidney, returning Wed, Nov 11, priced at $531 found 2 days ago
American Airlines
Sat, Oct 31 - Wed, Nov 11
BOS
Boston
SDY
Sidney
$531 Roundtrip, found 15 hours ago
$531
Roundtrip
found 15 hours ago
Select American Airlines flight, departing Sat, Oct 31 from Boston to Sidney, returning Wed, Nov 11, priced at $531 found 15 hours ago
United
Sat, Oct 31 - Wed, Nov 11
BOS
Boston
SDY
Sidney
$536 Roundtrip, found 2 days ago
$536
Roundtrip
found 2 days ago
Select United flight, departing Sat, Oct 31 from Boston to Sidney, returning Wed, Nov 11, priced at $536 found 2 days ago
American Airlines
Thu, Oct 1 - Sat, Oct 17
BOS
Boston
SDY
Sidney
$546 Roundtrip, found 6 days ago
$546
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Oct 1 from Boston to Sidney, returning Sat, Oct 17, priced at $546 found 6 days ago
United
Sat, Oct 31 - Wed, Nov 11
BOS
Boston
SDY
Sidney
$546 Roundtrip, found 15 hours ago
$546
Roundtrip
found 15 hours ago
Select United flight, departing Sat, Oct 31 from Boston to Sidney, returning Wed, Nov 11, priced at $546 found 15 hours ago

Alternative airports near Sidney

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Sidney-Richland Municipal SDY. Cheapest and Closest option available. Average driving time to city center is 3 minutes. Flights from $804
SDY
Sidney-Richland Municipal
CheapestClosest
Average driving time to city center3 min
Flights from $804

Frequently asked questions

How much does a flight from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal) cost?
You can find cheap one-way flights from $258 and cheap return flights from $516 BOS to SDY with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when BOS to SDY ticket fares go up or down.
What is the cheapest month to fly from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
The cheapest month to fly from BOS to SDY is October when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
Enter BOS to SDY and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
United, American Airlines and Alaska Airlines are just some of the carriers that fly from Boston, MA (BOS) to Sidney, MT (SDY). Use Expedia's flight search tool to compare airlines on this route and find our cheapest option for your trip. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
To find a cheap flight from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from BOS to SDY. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
A flight from BOS to SDY with a layover takes around 12 hours 50 minutes, with the route covering approximately 1,647 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
Select the "Business class" and "First class" filters when looking for BOS to SDY flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal) flight with Expedia?
It's easy to earn miles on a Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal) at the last minute?
Typically, booking a last minute flight from Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal) flight and hotel package?
Securing a Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities 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 Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal)?
If you booked your Boston, MA (BOS-Logan Intl.) to Sidney, MT (SDY-Sidney-Richland Municipal) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Logan Intl.
Destination airport
Sidney-Richland Municipal
Roundtrip price
$515
Distance
1647 mi

*Flight schedules are subject to change.

*Available to One Key members.

 

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