$607 Cheap Flights from Chicago (ORD) to Ostrava (OSR)

View $607 flight on Sun, Nov 2, 2025Opens in a new window

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Ostrava (OSR-Leos Janacek)

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Cheap Flights from Chicago to Ostrava (ORD-OSR)

Prices were available within the past 7 days and start at $607 for one-way flights and $840 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

LOT-Polish Airlines
Sat, Jan 24 - Wed, Feb 4
ORD
Chicago
OSR
Ostrava
$840 Roundtrip, found 4 hours ago
$840
Roundtrip
found 4 hours ago
Select LOT-Polish Airlines flight, departing Sat, Jan 24 from Chicago to Ostrava, returning Wed, Feb 4, priced at $840 found 4 hours ago
LOT-Polish Airlines
Sat, Jan 24 - Mon, Feb 9
ORD
Chicago
OSR
Ostrava
$856 Roundtrip, found 4 hours ago
$856
Roundtrip
found 4 hours ago
Select LOT-Polish Airlines flight, departing Sat, Jan 24 from Chicago to Ostrava, returning Mon, Feb 9, priced at $856 found 4 hours ago
LOT-Polish Airlines
Sun, Jan 25 - Mon, Feb 9
ORD
Chicago
OSR
Ostrava
$872 Roundtrip, found 4 hours ago
$872
Roundtrip
found 4 hours ago
Select LOT-Polish Airlines flight, departing Sun, Jan 25 from Chicago to Ostrava, returning Mon, Feb 9, priced at $872 found 4 hours ago
LOT-Polish Airlines
Tue, Jan 13 - Wed, Jan 28
ORD
Chicago
OSR
Ostrava
$887 Roundtrip, found 4 hours ago
$887
Roundtrip
found 4 hours ago
Select LOT-Polish Airlines flight, departing Tue, Jan 13 from Chicago to Ostrava, returning Wed, Jan 28, priced at $887 found 4 hours ago
JetBlue Airways
Tue, Jan 20 - Wed, Feb 4
ORD
Chicago
OSR
Ostrava
$900 Roundtrip, found 4 hours ago
$900
Roundtrip
found 4 hours ago
Select JetBlue Airways flight, departing Tue, Jan 20 from Chicago to Ostrava, returning Wed, Feb 4, priced at $900 found 4 hours ago
JetBlue Airways
Tue, Jan 27 - Wed, Feb 11
ORD
Chicago
OSR
Ostrava
$900 Roundtrip, found 4 hours ago
$900
Roundtrip
found 4 hours ago
Select JetBlue Airways flight, departing Tue, Jan 27 from Chicago to Ostrava, returning Wed, Feb 11, priced at $900 found 4 hours ago
LOT-Polish Airlines
Tue, Jan 13 - Mon, Feb 2
ORD
Chicago
OSR
Ostrava
$903 Roundtrip, found 4 hours ago
$903
Roundtrip
found 4 hours ago
Select LOT-Polish Airlines flight, departing Tue, Jan 13 from Chicago to Ostrava, returning Mon, Feb 2, priced at $903 found 4 hours ago
JetBlue Airways
Tue, Nov 11 - Wed, Nov 26
ORD
Chicago
OSR
Ostrava
$915 Roundtrip, found 7 hours ago
$915
Roundtrip
found 7 hours ago
Select JetBlue Airways flight, departing Tue, Nov 11 from Chicago to Ostrava, returning Wed, Nov 26, priced at $915 found 7 hours ago
LOT-Polish Airlines
Sun, Dec 28 - Mon, Jan 12
ORD
Chicago
OSR
Ostrava
$919 Roundtrip, found 4 hours ago
$919
Roundtrip
found 4 hours ago
Select LOT-Polish Airlines flight, departing Sun, Dec 28 from Chicago to Ostrava, returning Mon, Jan 12, priced at $919 found 4 hours ago
JetBlue Airways
Tue, Dec 9 - Wed, Dec 24
ORD
Chicago
OSR
Ostrava
$925 Roundtrip, found 2 days ago
$925
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Tue, Dec 9 from Chicago to Ostrava, returning Wed, Dec 24, priced at $925 found 2 days ago
TAP Portugal
Sun, Jan 4 - Wed, Jan 14
ORD
Chicago
OSR
Ostrava
$985 Roundtrip, found 4 hours ago
$985
Roundtrip
found 4 hours ago
Select TAP Portugal flight, departing Sun, Jan 4 from Chicago to Ostrava, returning Wed, Jan 14, priced at $985 found 4 hours ago
Flights from Chicago (ORD) to Ostrava (OSR)
Origin airport
O'Hare Intl.
Destination airport
Leos Janacek
Airlines serving
LOT-Polish Airlines, TAP Portugal
Roundtrip price
$840
Distance
4686 mi

Chicago to Ostrava Flights

The cheapest times to fly from Chicago 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 Chicago to Ostrava are during the month of January. You can find some of the cheapest flights from Chicago to Ostrava with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Ostrava

Sunday is one of the best days to book for cheap flights from Chicago 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 Chicago 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 Chicago to Ostrava in 2025. You can also book with separate airlines for your outbound and return journeys, from $607 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 Chicago 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 Chicago 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 O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR) cost?
Grab a cheap one-way flight from $607 or cheap return flight from $840 from O'Hare Intl. Airport (ORD) 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 O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR)?
The cheapest month to fly from ORD to OSR is January, when demand is low. Off-peak season is typically when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from ORD to OSR. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR)?
You'll need to take a flight with a layover if you're traveling from O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR). 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 ORD to OSR?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change based on the season, 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 O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR)?
To avoid potential delays on the O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR) route, aim to fly before 3 PM. Departures after this time have a 22% higher chance of being 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 O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR) last-minute?
Booking your ticket from ORD to OSR just before your trip is usually more expensive. But if there's some wiggle room with your travel times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book an ORD to OSR flight and hotel package?
Opting for an ORD to OSR flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our wide range of stays and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Leos Janacek Airport (OSR)?
Typically, you can modify or cancel your ORD to OSR flight. However, there may be additional charges, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you need further details, visit our Customer Service portal.

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*Available to One Key members.