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$340+ Cheap flights from Otopeni Intl (OTP) to Illinois

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
OTP — ORD
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Otopeni Intl to Illinois

Cheapest flights from Otopeni Intl to Illinois
Explore the most affordable flight options available from Otopeni Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 12/212:50 pmOTP - ORD
1 stop13h 15mUnited Airlines
Sun 1/1112:38 pmORD - OTP
2 stops27h 12mUnited Airlines
Deal found 12/14$701
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/173:30 pmOTP - ORD
1 stop26h 35mTurkish Airlines
Fri 1/1611:50 amORD - OTP
1 stop18h 20mTurkish Airlines
Deal found 12/14$745
This United Airlines deal was found by Cheapflights users on 12/13. 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.
Wed 12/242:40 pmOTP - ORD
2 stops36h 12mUnited Airlines
Tue 1/66:05 pmORD - OTP
2 stops35h 55mUnited Airlines
Deal found 12/13$756
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Thu 12/185:50 amOTP - ORD
1 stop15h 20mUnited Airlines
Sun 1/114:20 pmORD - OTP
1 stop13h 45mUnited Airlines
Deal found 12/14$760
This Booking.com deal was found by Cheapflights users on 12/13. 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.
Mon 12/225:55 amOTP - ORD
1 stop17h 25mLufthansa
Thu 1/16:00 pmORD - OTP
1 stop16h 35mLufthansa
Deal found 12/13$767
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Wed 12/246:05 amOTP - ORD
1 stop15h 05mUnited Airlines
Tue 1/139:13 amORD - OTP
2 stops20h 42mUnited Airlines
Deal found 12/14$770
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:05 pmOTP - ORD
1 stop13h 30mMultiple Airlines
Wed 1/146:30 pmORD - OTP
2 stops16h 25mMultiple Airlines
Deal found 12/14$773
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Tue 12/235:55 amOTP - ORD
2 stops25h 49mUnited Airlines
Tue 1/137:30 amORD - OTP
2 stops22h 25mUnited Airlines
Deal found 12/14$775
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Tue 12/235:55 amOTP - ORD
2 stops23h 44mUnited Airlines
Sat 1/1710:00 amORD - OTP
2 stops18h 30mUnited Airlines
Deal found 12/14$779
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:05 pmOTP - ORD
1 stop13h 30mMultiple Airlines
Sat 1/106:30 pmORD - OTP
2 stops34h 30mMultiple Airlines
Deal found 12/14$782
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Wed 12/242:40 pmOTP - ORD
1 stop13h 25mUnited Airlines
Sun 1/118:52 amORD - OTP
2 stops30h 58mUnited Airlines
Deal found 12/14$788
This Delta deal was found by Cheapflights users on 12/14. 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.
Tue 12/231:55 pmOTP - MDW
2 stops35h 31mDelta
Sat 1/171:28 pmMDW - OTP
2 stops15h 32mDelta
Deal found 12/14$850

Find flight deals from Otopeni Intl to Illinois

Keep the following information in mind while searching for Otopeni Intl to Illinois flight deals. Data was last updated December 15, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$606
(Gotogate)

One-way from

$340
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$773

Good round-trip deal

$462 or less

Good one-way deal

$249 or less
Provider with most accurate pricing for Bucharest (BUH)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Bucharest (BUH)-Chicago (CHI) flights.
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From Bucharest Otopeni Intl to Illinois
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One-way flight from Bucharest Otopeni Intl to Illinois
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Bucharest Otopeni Intl to Illinois.
Search Deals
Price to beat on a one-way flight from Bucharest Otopeni Intl to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Otopeni Intl to Illinois 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 December 15, 2025.
Use the filters below to find and compare flights from Bucharest Otopeni Intl Airport to Illinois that are best for you.

Fly from

Otopeni Intl

Fly to

Illinois

Route

Depart

Return

Price

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Fri 2/6

10:10 am-10:05 am

1 stop31h 55m

Chicago O'Hare Intl

Sun 2/8

11:50 am-8:50 am

1 stop13h 00m

$646

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Tue 3/10

9:50 pm-11:05 am

1 stop20h 15m

Chicago O'Hare Intl

Sun 3/29

7:50 pm-8:25 pm

1 stop16h 35m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Wed 3/4

3:30 pm-10:05 am

1 stop26h 35m

Chicago O'Hare Intl

Sun 3/29

11:25 am-8:10 am

1 stop12h 45m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sat 3/7

9:50 pm-10:05 am

1 stop20h 15m

Chicago O'Hare Intl

Wed 3/25

9:20 pm-8:30 pm

1 stop16h 10m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sun 3/8

10:10 am-7:25 pm

1 stop16h 15m

Chicago O'Hare Intl

Wed 3/25

9:20 pm-8:30 pm

1 stop16h 10m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Wed 3/4

10:10 am-6:25 pm

1 stop16h 15m

Chicago O'Hare Intl

Mon 3/30

7:50 pm-8:25 pm

1 stop16h 35m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Mon 4/20

9:30 am-6:15 pm

1 stop16h 45m

Chicago O'Hare Intl

Sat 5/9

11:25 am-8:10 am

1 stop12h 45m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Tue 3/10

10:10 am-11:05 am

1 stop31h 55m

Chicago O'Hare Intl

Mon 3/30

11:25 am-2:35 pm

1 stop19h 10m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Wed 3/4

9:50 pm-10:05 am

1 stop20h 15m

Chicago O'Hare Intl

Thu 3/26

9:20 pm-8:45 am

1 stop28h 25m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sun 3/8

9:50 pm-11:05 am

1 stop20h 15m

Chicago O'Hare Intl

Mon 3/30

7:50 pm-8:25 pm

1 stop16h 35m

$649

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 35 results
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Best time to book a flight from Otopeni Intl to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois 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 Illinois

What is the cheapest month to book a flight from Bucharest Otopeni Intl Airport to Illinois?

Currently, July is the cheapest month in which you can book a flight from Bucharest Otopeni Intl Airport to Illinois (average of $353). Flying from Bucharest Otopeni Intl Airport to Illinois in January is currently the most expensive (average of $642). 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 IL?

Find hourly flight availability from Otopeni Intl to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

It’s optimal to fly from Bucharest Otopeni Intl Airport to Illinois in the morning. By choosing this option you can save up to 49% on the cost of your flight, compared to a flight in the evening.

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated December 15, 2025.
Read reviews from past customers who have flown KLM, LOT, and Turkish Airlines from Bucharest Otopeni Intl Airport to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,432 reviews

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,432 reviews
KLM
7.7
Good
1,432 reviews

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
LOT
7.6
Good
1,147 reviews
KLM
7.7
Good
1,432 reviews

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Turkish Airlines
7.3
Good
4,100 reviews
KLM
7.7
Good
1,432 reviews

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,631 reviews
KLM
7.7
Good
1,432 reviews

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,578 reviews
KLM
7.7
Good
1,432 reviews

Comfort

7.6

Overall

7.7

Food

7.2

Boarding

7.8

Entertainment

7.1

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

Related info for your journey

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

  • How long is the flight from Bucharest Otopeni Intl Airport to Illinois?

    Turkish Airlines, Delta, and KLM can get you from Bucharest Otopeni Intl Airport to Illinois in just under 18h 16m. Your travel time can differ by up to 13h 39m. Airlines will cover a distance of 5203 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Bucharest Otopeni Intl Airport to Illinois one-way?

    For one-way options, check prices for Air Serbia. According to our data, you can fly for as low as $364. Users have also found prices from $575 and $615 on Turkish Airlines and Lufthansa, respectively.

  • What are the most popular routes from Bucharest Otopeni Intl Airport to Illinois?

    The most popular route from Bucharest Otopeni Intl Airport to Illinois is Bucharest Otopeni Intl - Chicago O'Hare Intl. You may also consider Bucharest Otopeni Intl - Chicago Midway or Bucharest Otopeni Intl - Lambert-St Louis.

  • What are the cheapest flights from Bucharest Otopeni Intl Airport to Illinois?

    The cheapest flight price from Bucharest Otopeni Intl Airport to Illinois is $244. On average you can expect to pay $359. The most popular route, (Bucharest Otopeni Intl - Chicago O'Hare Intl), can usually be booked for $508.

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

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

  • How can I find direct flights from Otopeni Intl to Illinois?

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

  • Can I find deals for business class flights from Otopeni Intl to Illinois?

    Yes. Cheapflights offers flight deals from Otopeni Intl to Illinois 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 Illinois?

    Currently, July is the cheapest month in which you can book a flight from Bucharest Otopeni Intl Airport to Illinois (average of $353). Flying from Bucharest Otopeni Intl Airport to Illinois in January is currently the most expensive (average of $642). 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

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Alternative routes for Otopeni Intl to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Otopeni Intl to Illinois

Discover the top 9 airlines that operate flights from Otopeni Intl to Illinois. 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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$493Average$768FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$548Average$595FlexibilityNo cancel feeOn-time71%
KLMCheapest$570Average$822FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$571Average$815FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$581Average$695FlexibilityNo cancel feeOn-time70%
LOTCheapest$584Average$670FlexibilityNo cancel feeOn-time81%
Air FranceCheapest$621Average$660FlexibilityNo cancel feeOn-time77%
DeltaCheapest$623Average$634FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$647Average$819FlexibilityNo cancel feeOn-time76%

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