$624 Cheap Flights from Boston (BOS) to Ostrava (OSR)

View $624 flight on Sun, Oct 19, 2025Opens in a new window

Popular airlines from Logan International Airport (BOS) to Ostrava (OSR-Leos Janacek)

Cheap Flights from Boston to Ostrava (BOS-OSR)

Prices were available within the past 7 days and start at $624 for one-way flights and $1,042 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Sun, Oct 19 - Mon, Nov 3
BOS
Boston
OSR
Ostrava
$1,042 Roundtrip, found 3 hours ago
$1,042
Roundtrip
found 3 hours ago
Select TAP Portugal flight, departing Sun, Oct 19 from Boston to Ostrava, returning Mon, Nov 3, priced at $1,042 found 3 hours ago
JetBlue Airways
Tue, Oct 14 - Tue, Oct 21
BOS
Boston
OSR
Ostrava
$1,254 Roundtrip, found 2 days ago
$1,254
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Oct 14 from Boston to Ostrava, returning Tue, Oct 21, priced at $1,254 found 2 days ago
JetBlue Airways
Tue, Oct 14 - Tue, Oct 21
BOS
Boston
OSR
Ostrava
$1,264 Roundtrip, found 2 days ago
$1,264
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Oct 14 from Boston to Ostrava, returning Tue, Oct 21, priced at $1,264 found 2 days ago
JetBlue Airways
Tue, Oct 14 - Tue, Oct 21
BOS
Boston
OSR
Ostrava
$1,266 Roundtrip, found 2 days ago
$1,266
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Oct 14 from Boston to Ostrava, returning Tue, Oct 21, priced at $1,266 found 2 days ago
JetBlue Airways
Tue, Oct 14 - Tue, Oct 21
BOS
Boston
OSR
Ostrava
$1,272 Roundtrip, found 2 days ago
$1,272
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Oct 14 from Boston to Ostrava, returning Tue, Oct 21, priced at $1,272 found 2 days ago
JetBlue Airways
Tue, Oct 14 - Tue, Oct 21
BOS
Boston
OSR
Ostrava
$1,276 Roundtrip, found 2 days ago
$1,276
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Oct 14 from Boston to Ostrava, returning Tue, Oct 21, priced at $1,276 found 2 days ago
JetBlue Airways
Tue, Oct 14 - Tue, Oct 21
BOS
Boston
OSR
Ostrava
$1,282 Roundtrip, found 2 days ago
$1,282
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Oct 14 from Boston to Ostrava, returning Tue, Oct 21, priced at $1,282 found 2 days ago
LOT-Polish Airlines
Tue, Oct 14 - Tue, Oct 21
BOS
Boston
OSR
Ostrava
$1,327 Roundtrip, found 2 days ago
$1,327
Roundtrip
found 2 days ago
Select LOT-Polish Airlines flight, departing Tue, Oct 14 from Boston to Ostrava, returning Tue, Oct 21, priced at $1,327 found 2 days ago
LOT-Polish Airlines
Tue, Oct 14 - Tue, Oct 21
BOS
Boston
OSR
Ostrava
$1,337 Roundtrip, found 2 days ago
$1,337
Roundtrip
found 2 days ago
Select LOT-Polish Airlines flight, departing Tue, Oct 14 from Boston to Ostrava, returning Tue, Oct 21, priced at $1,337 found 2 days ago
Lufthansa
Sun, Oct 19 - Mon, Nov 3
BOS
Boston
OSR
Ostrava
$5,771 Roundtrip, found 3 hours ago
$5,771
Roundtrip
found 3 hours ago
Select Lufthansa flight, departing Sun, Oct 19 from Boston to Ostrava, returning Mon, Nov 3, priced at $5,771 found 3 hours ago
Flights from Boston (BOS) to Ostrava (OSR)
Origin airport
Logan Intl.
Destination airport
Leos Janacek
Roundtrip price
$1,041
Distance
4048 mi

Boston to Ostrava Flights

The cheapest times to fly from Boston to Ostrava

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

 

The best time to book a flight from Boston to Ostrava

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

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 Boston to Ostrava in 2025. You can also book with separate airlines for your outbound and return journeys, from $624 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 Boston to Ostrava 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 Boston to Ostrava 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.

 

Frequently asked questions

How much does a flight from Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR) cost?
Snag a cheap one-way flight from $624 or cheap return flight from $1,042 from Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR) 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 Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR)?
The cheapest month to fly from BOS to OSR is October, when there's less demand. Off-peak season is usually when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest BOS to OSR flight.
How many flights per day from Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR)?
There aren't any daily direct flights departing from Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from BOS to OSR?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change 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 Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR)?
To reach Leos Janacek Airport (OSR) on time, select a flight that takes off from Logan Intl. Airport (BOS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR) last-minute?
Last-minute fares from BOS to OSR are generally more expensive. To lock in the best rates, start looking for flights well in advance. That being said, if you're flexible with your travel dates, you may score a cheap ticket right before your journey.
Is it cheaper to book a BOS to OSR flight and hotel package?
You'll generally save money by booking a BOS to OSR flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. After selecting your preferred accommodations and flights, consider adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Logan Intl. Airport (BOS) to Leos Janacek Airport (OSR)?
If you reserved your BOS to OSR flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more details.

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*Available to One Key members.