Cheap Flights from Baltimore (BWI) to Sion (SIR)

Popular airlines from Baltimore Washington Intl. Airport (BWI) to Sion (SIR)

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Frequently asked questions

How much does a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR) cost?
Secure a cheap one-way flight or cheap return flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR) 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR)?
Flying in can help you save, as it's the cheapest month for flights between BWI and SIR. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll take you from BWI to SIR. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR)?
You'll have to catch a flight with a layover when traveling from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from BWI to SIR?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change based on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR)?
Book a flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR) that leaves before 3 PM to reduce the likelihood of delays. Later departures 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 Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR) last-minute?
Waiting until just before your departure to book your flight from BWI to SIR generally means paying more. While you may come across some last-minute offers, they're not always guaranteed. Keep your travel schedule open to maximize your chances of scoring a bargain.
Is it cheaper to book a BWI to SIR flight and hotel package?
Compared with arranging flights and hotels separately, booking a BWI to SIR flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one convenient place will take the stress out of planning your trip. Simply pick your flights and select from our extensive range of stays, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Sion Airport (SIR)?
It's generally possible to reschedule or cancel your BWI to SIR flight. However, if it's been more than 24 hours since booking, additional charges 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 information on our Customer Service portal.

Travel information

Travel information

Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Sion
Distance
4089 mi

Book with confidence

Book with confidence

Baltimore to Sion Flights

The cheapest times to fly from Baltimore to Sion

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

 

The best time to book a flight from Baltimore to Sion

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

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 Baltimore to Sion 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 Baltimore to Sion 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 Baltimore to Sion 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.

 

Baltimore to Sion Flights

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*Available to One Key members.