HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
O'Hare Intl

$378+ Cheap flights from Otopeni Intl (OTP) to O'Hare Intl (ORD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
OTP — ORD
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Otopeni Intl to O'Hare Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Bucharest Otopeni Intl to Chicago O'Hare Intl are usually found in November or September, booked 90 days in advance, depart on a Tuesday or Sunday and return on a Tuesday

Cheap flight deals from Otopeni Intl to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Otopeni Intl (OTP) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 30, 2025.

Round-trip from

$651
(American Airlines)

One-way from

$378
(Kiwi.com)

Popular in

August

Cheapest in

November

Average price

$781
From Bucharest Otopeni Intl to Chicago O'Hare Intl
Search Deals
One-way flight from Bucharest Otopeni Intl to Chicago O'Hare Intl
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Otopeni Intl to O'Hare Intl

Cheapest flights from Otopeni Intl to O'Hare Intl
Explore the most affordable flight options available from Otopeni Intl to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

This American Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/68:25 amOTP - ORD
1 stop35h 25mAmerican Airlines
Sat 9/205:40 pmORD - OTP
1 stop12h 20mAmerican Airlines
Deal found 7/30$651
This Booking.com deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:00 amOTP - ORD
1 stop13h 00mMultiple Airlines
Sat 10/187:05 pmORD - OTP
1 stop12h 15mMultiple Airlines
Deal found 7/29$652
This British Airways deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/278:05 pmOTP - ORD
1 stop23h 45mBritish Airways
Sat 10/1110:35 pmORD - OTP
1 stop17h 55mBritish Airways
Deal found 7/30$660
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/12:50 pmOTP - ORD
1 stop13h 15mUnited Airlines
Sun 12/1410:35 pmORD - OTP
1 stop17h 15mUnited Airlines
Deal found 7/30$661
This Lufthansa deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:00 amOTP - ORD
2 stops20h 32mLufthansa
Fri 10/109:40 pmORD - OTP
1 stop19h 20mLufthansa
Deal found 7/30$669
This Scandinavian Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/38:35 pmOTP - ORD
2 stops33h 21mScandinavian Airlines
Fri 9/1210:15 amORD - OTP
2 stops26h 20mScandinavian Airlines
Deal found 7/28$676
This Air Canada deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:30 amOTP - ORD
2 stops19h 42mAir Canada
Wed 9/242:08 pmORD - OTP
2 stops15h 07mAir Canada
Deal found 7/28$680
This SWISS deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/34:10 pmOTP - ORD
1 stop31h 45mSWISS
Sun 9/147:05 pmORD - OTP
1 stop34h 40mSWISS
Deal found 7/28$681
This Austrian Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:55 pmOTP - ORD
2 stops31h 30mAustrian Airlines
Mon 9/154:20 pmORD - OTP
1 stop17h 45mAustrian Airlines
Deal found 7/28$686
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:30 amOTP - ORD
2 stops20h 35mDelta
Sat 10/1110:36 amORD - OTP
2 stops18h 04mDelta
Deal found 7/30$687
This KLM deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/218:35 amOTP - ORD
1 stop13h 35mKLM
Wed 8/274:40 pmORD - OTP
1 stop14h 45mKLM
Deal found 7/28$715

Cheapflights Fare Finder

 
Customize your flight search to find flights from Otopeni Intl to O'Hare Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
Use the filters below to find and compare flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport that are best for you.

Fly from

Otopeni Intl

Fly to

O'Hare Intl

Route

Depart

Return

Price

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sat 9/6

8:25 am-11:50 am

1 stop35h 25m

Chicago O'Hare Intl

Sat 9/20

5:40 pm-2:00 pm

1 stop12h 20m

$651

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Tue 9/30

6:00 am-11:00 am

1 stop13h 00m

Chicago O'Hare Intl

Sat 10/18

7:05 pm-3:20 pm

1 stop12h 15m

$652

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sat 9/27

8:05 pm-11:50 am

1 stop23h 45m

Chicago O'Hare Intl

Sat 10/11

10:35 pm-12:30 am

1 stop17h 55m

$660

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Thu 9/11

6:00 am-7:55 pm

1 stop21h 55m

Chicago O'Hare Intl

Thu 9/25

6:35 pm-11:40 pm

1 stop21h 05m

$661

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Tue 9/30

6:00 am-6:30 pm

2 stops20h 30m

Chicago O'Hare Intl

Sat 10/18

6:14 pm-6:35 pm

2 stops40h 21m

$663

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sat 9/6

7:00 am-5:37 pm

2 stops18h 37m

Chicago O'Hare Intl

Sat 9/20

5:00 pm-5:20 pm

2 stops16h 20m

$664

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Wed 9/3

8:35 pm-9:56 pm

2 stops33h 21m

Chicago O'Hare Intl

Fri 9/12

10:15 am-8:35 pm

2 stops26h 20m

$676

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Fri 9/19

6:30 am-6:12 pm

2 stops19h 42m

Chicago O'Hare Intl

Wed 9/24

2:08 pm-1:15 pm

2 stops15h 07m

$680

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Wed 9/3

4:10 pm-3:55 pm

1 stop31h 45m

Chicago O'Hare Intl

Mon 9/15

7:05 pm-3:20 pm

1 stop12h 15m

$681

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Wed 9/3

6:55 pm-6:25 pm

2 stops31h 30m

Chicago O'Hare Intl

Mon 9/15

4:20 pm-6:05 pm

1 stop17h 45m

$686

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 18 results
1
2

Best time to book a flight from Otopeni Intl to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Otopeni Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport

How far ahead should I book a flight from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Otopeni Intl to O'Hare Intl. Price data was last updated on July 25, 2025.

Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport (average of $245). Flying from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from OTP to ORD?

Find hourly flight availability from Otopeni Intl to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 18% on flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport by exploring options for tickets in the afternoon.

How much does it cost to fly round-trip from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport?

What’s the top layover airport for flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport?

Share of 1-stop round-trip flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Warsaw (WAW) – chosen by Cheapflights users on 57% of 1-stop itineraries from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport on Cheapflights.

What’s the cheapest layover airport for flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport?

Average round-trip fare for 1-stop flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Warsaw (WAW) is the most affordable 1-stop option, with an average round-trip price of $590.

What’s the fastest layover option from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport?

Shortest average travel time for 1-stop one-way flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Warsaw (WAW) have the shortest average one-way travel time for 1-stop routes: 13h 20m.

Which airport typically offers the quickest layover for flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport?

Average layover duration for 1-stop one-way flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Warsaw (WAW) offer the fastest connection on this route, with an average layover time of 1h 18m.

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated July 30, 2025.
Read through reviews of airlines operating flights from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport, such as Delta, KLM, and Austrian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Michael,Jul 2025

AMS - ATL

Overall it was great experience, with the exception of snack food. The food offered in two main meals was just fine but for the mid-flight snack, the only option was a large cookie, too sweet and high sugar content. Snacks at the back of the plane were also mainly sweets. There was one nice baked cheddar option but it quickly ran out.

Related info for your journey

Find useful and relevant information for your journey from Otopeni Intl to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport round-trip?

    American Airlines, at $651, was found to be the cheapest airline from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport.Alternate airlines to your destination round-trip include British Airways and Lufthansa. You may be able to fly from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport for 5% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport one-way?

    To fly one-way, consider booking your trip with ITA Airways, which is currently one of the cheapest options available, starting at $493. Air Serbia flights start at $559 while deals on Scandinavian Airlines start at $571 one-way.

  • Can I find deals for flights from Otopeni Intl to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Otopeni Intl to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Otopeni Intl to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Otopeni Intl to O'Hare Intl.

  • Can I find deals for business class flights from Otopeni Intl to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Otopeni Intl to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport (average of $245). Flying from Bucharest Otopeni Intl Airport to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Schaumburg
Rosemont
Beloit
Hoffman Estates
Skokie
Naperville
Des Plaines
Elgin
Arlington Heights
Elk Grove Village
Racine
Rockford
Tinley Park
Orland Park
Merrillville
Downers Grove
Evanston
Lake Geneva
Gurnee
Joliet

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 9 airlines flying from Otopeni Intl to O'Hare Intl

Discover the top 9 airlines that operate flights from Otopeni Intl to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$336Average$760FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$548Average$595FlexibilityNo cancel feeOn-time71%
KLMCheapest$570Average$707FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$581Average$654FlexibilityNo cancel feeOn-time77%
LOTCheapest$583Average$618FlexibilityNo cancel feeOn-time81%
LufthansaCheapest$593Average$849FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$594Average$808FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$597Average$695FlexibilityNo cancel feeOn-time70%
DeltaCheapest$623Average$634FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.