$2,876 Cheap Flights from Sion (SIR) to Boston (BOS)

View $2,876 flight on Sun, Nov 30, 2025Opens in a new window

Popular airlines from Sion (SIR) to Logan International Airport (BOS)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Sion to Boston (SIR-BOS)

Prices were available within the past 7 days and start at $2,876 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frequently asked questions

How much does a flight from Sion Airport (SIR) to Logan Intl. Airport (BOS) cost?
Get a cheap one-way flight from $2,876 or cheap return flight from Sion Airport (SIR) to Logan Intl. Airport (BOS) 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 Sion Airport (SIR) to Logan Intl. Airport (BOS)?
The cheapest month to fly from SIR to BOS is , when there's less demand. Off-peak season is usually when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Sion Airport (SIR) to Logan Intl. Airport (BOS)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from SIR to BOS. Then, sort your results by "Price (lowest to highest)" to snap up the best deal available.
How many flights per day from Sion Airport (SIR) to Logan Intl. Airport (BOS)?
You'll need to book a flight with a layover when traveling from Sion Airport (SIR) to Logan Intl. Airport (BOS). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from SIR to BOS?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sion Airport (SIR) to Logan Intl. Airport (BOS)?
To avoid potential delays on the Sion Airport (SIR) to Logan Intl. Airport (BOS) route, aim to travel before 3 PM. Later flights have a 22% higher chance of cancellation.**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 Sion Airport (SIR) to Logan Intl. Airport (BOS) last-minute?
Last-minute bookings from SIR to BOS are usually more expensive. To lock in the lowest prices, start searching for flights well ahead of time. That being said, if you can play around with your travel dates, you may land a cheap fare just before your departure.
Is it cheaper to book a SIR to BOS flight and hotel package?
Booking a SIR to BOS flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Pick from our impressive range of accommodations and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Sion Airport (SIR) to Logan Intl. Airport (BOS)?
Generally, it's possible to reschedule or cancel your SIR to BOS flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Sion
Destination airport
Logan Intl.
Distance
3721 mi

Book with confidence

Sion to Boston Flights

The cheapest times to fly from Sion to Boston

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 Sion to Boston are during the month of . You can find some of the cheapest flights from Sion to Boston with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sion to Boston

Sunday is one of the best days to book for cheap flights from Sion to Boston: 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 Sion to Boston

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 Sion to Boston in 2025. You can also book with separate airlines for your outbound and return journeys, from $2,876 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 Sion to Boston 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 Sion to Boston 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.

 

Sion to Boston Flights

Explore a world of travel with Expedia

*Available to One Key members.