$627 Cheap Flights from Chicago (ORD) to Ostrava (OSR)

View $627 flight on Fri, Mar 20, 2026Opens in a new window

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

Cheap Flights from Chicago to Ostrava (ORD-OSR)

Prices were available within the past 7 days and start at $627 for one-way flights and $735 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

LOT-Polish Airlines
Wed, Nov 5 - Wed, Nov 12
ORD
Chicago
OSR
Ostrava
$735 Roundtrip, found 2 days ago
$735
Roundtrip
found 2 days ago
Select LOT-Polish Airlines flight, departing Wed, Nov 5 from Chicago to Ostrava, returning Wed, Nov 12, priced at $735 found 2 days ago
LOT-Polish Airlines
Wed, Feb 4 - Tue, Mar 17
ORD
Chicago
OSR
Ostrava
$845 Roundtrip, found 2 hours ago
$845
Roundtrip
found 2 hours ago
Select LOT-Polish Airlines flight, departing Wed, Feb 4 from Chicago to Ostrava, returning Tue, Mar 17, priced at $845 found 2 hours ago
LOT-Polish Airlines
Wed, Feb 4 - Tue, Mar 17
ORD
Chicago
OSR
Ostrava
$848 Roundtrip, found 2 hours ago
$848
Roundtrip
found 2 hours ago
Select LOT-Polish Airlines flight, departing Wed, Feb 4 from Chicago to Ostrava, returning Tue, Mar 17, priced at $848 found 2 hours ago
JetBlue Airways
Tue, Feb 3 - Tue, Mar 17
ORD
Chicago
OSR
Ostrava
$851 Roundtrip, found 2 hours ago
$851
Roundtrip
found 2 hours ago
Select JetBlue Airways flight, departing Tue, Feb 3 from Chicago to Ostrava, returning Tue, Mar 17, priced at $851 found 2 hours ago
LOT-Polish Airlines
Wed, Dec 24 - Mon, Jan 12
ORD
Chicago
OSR
Ostrava
$856 Roundtrip, found 4 days ago
$856
Roundtrip
found 4 days ago
Select LOT-Polish Airlines flight, departing Wed, Dec 24 from Chicago to Ostrava, returning Mon, Jan 12, priced at $856 found 4 days ago
LOT-Polish Airlines
Sun, Dec 28 - Mon, Jan 12
ORD
Chicago
OSR
Ostrava
$872 Roundtrip, found 4 days ago
$872
Roundtrip
found 4 days ago
Select LOT-Polish Airlines flight, departing Sun, Dec 28 from Chicago to Ostrava, returning Mon, Jan 12, priced at $872 found 4 days ago
LOT-Polish Airlines
Wed, Dec 24 - Wed, Jan 14
ORD
Chicago
OSR
Ostrava
$887 Roundtrip, found 4 days ago
$887
Roundtrip
found 4 days ago
Select LOT-Polish Airlines flight, departing Wed, Dec 24 from Chicago to Ostrava, returning Wed, Jan 14, priced at $887 found 4 days ago
LOT-Polish Airlines
Sun, Dec 28 - Wed, Jan 14
ORD
Chicago
OSR
Ostrava
$903 Roundtrip, found 4 days ago
$903
Roundtrip
found 4 days ago
Select LOT-Polish Airlines flight, departing Sun, Dec 28 from Chicago to Ostrava, returning Wed, Jan 14, priced at $903 found 4 days ago
LOT-Polish Airlines
Wed, Nov 5 - Wed, Nov 12
ORD
Chicago
OSR
Ostrava
$927 Roundtrip, found 2 days ago
$927
Roundtrip
found 2 days ago
Select LOT-Polish Airlines flight, departing Wed, Nov 5 from Chicago to Ostrava, returning Wed, Nov 12, priced at $927 found 2 days ago
TAP Portugal
Fri, Dec 26 - Fri, Jan 9
ORD
Chicago
OSR
Ostrava
$1,269 Roundtrip, found 4 days ago
$1,269
Roundtrip
found 4 days ago
Select TAP Portugal flight, departing Fri, Dec 26 from Chicago to Ostrava, returning Fri, Jan 9, priced at $1,269 found 4 days ago

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 $627 or cheap return flight from $735 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 November, 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.

Travel information

Origin airport
O'Hare Intl.
Destination airport
Leos Janacek
Roundtrip price
$734
Distance
4686 mi

Book with confidence

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 November. 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 $627 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.

 

Chicago to Ostrava Flights

Explore a world of travel with Expedia

*Available to One Key members.