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$393+ 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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
OTP — ORD
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Gotogate deal was found by Cheapflights users on 1/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/125:50 am
OTP
-
ORD
2 stops35h 23m
Air Canada
Wed 2/2510:00 am
ORD
-
OTP
2 stops20h 00m
Air Canada
Deal found 1/27$608
This Travelocity deal was found by Cheapflights users on 1/27. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/56:05 am
OTP
-
ORD
1 stop12h 55m
Multiple Airlines
Sat 4/117:05 pm
ORD
-
OTP
1 stop22h 00m
Multiple Airlines
Deal found 1/27$609
This Lufthansa deal was found by Cheapflights users on 1/27. 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 3/135:55 am
OTP
-
ORD
1 stop15h 30m
Multiple Airlines
Sun 3/297:05 pm
ORD
-
OTP
1 stop12h 15m
Multiple Airlines
Deal found 1/27$611
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/245:55 am
OTP
-
ORD
1 stop17h 25m
United Airlines
Tue 5/59:40 pm
ORD
-
OTP
1 stop19h 30m
United Airlines
Deal found 1/27$613
This United Airlines deal was found by Cheapflights users on 1/27. 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 3/245:55 am
OTP
-
ORD
1 stop17h 25m
United Airlines
Tue 4/289:40 pm
ORD
-
OTP
1 stop19h 30m
United Airlines
Deal found 1/27$614
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/125:50 am
OTP
-
ORD
1 stop15h 35m
United Airlines
Mon 3/23:51 pm
ORD
-
OTP
2 stops18h 44m
United Airlines
Deal found 1/27$615
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/125:50 am
OTP
-
ORD
1 stop15h 35m
United Airlines
Wed 2/251:02 pm
ORD
-
OTP
2 stops16h 58m
United Airlines
Deal found 1/27$616
This Booking.com deal was found by Cheapflights users on 1/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/75:55 am
OTP
-
ORD
1 stop13h 15m
Multiple Airlines
Mon 3/237:50 pm
ORD
-
OTP
1 stop21h 40m
Multiple Airlines
Deal found 1/28$617
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/125:50 am
OTP
-
ORD
1 stop17h 30m
United Airlines
Fri 3/64:20 pm
ORD
-
OTP
1 stop12h 10m
United Airlines
Deal found 1/27$618
This SWISS deal was found by Cheapflights users on 1/27. 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 2/114:35 pm
OTP
-
ORD
1 stop31h 45m
SWISS
Mon 3/24:10 pm
ORD
-
OTP
1 stop24h 20m
SWISS
Deal found 1/27$619
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/116:05 am
OTP
-
ORD
2 stops20h 32m
United Airlines
Mon 3/29:50 pm
ORD
-
OTP
1 stop12h 45m
United Airlines
Deal found 1/27$620
This Iberia deal was found by Cheapflights users on 1/27. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/128:00 am
OTP
-
STL
2 stops21h 12m
Multiple Airlines
Mon 2/1611:59 am
STL
-
OTP
2 stops27h 01m
Multiple Airlines
Deal found 1/27$638

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$608
(Gotogate)

One-way from

$393
(Kiwi.com)

Popular in

July

Cheapest in

September

Average price

$663

Good round-trip deal

$462 or less
Provider with most accurate pricing for Bucharest (BUH)-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Bucharest (BUH)-Chicago (CHI) flights.
Search Deals
From Bucharest Otopeni Intl to Illinois
Search Deals
One-way flight from Bucharest Otopeni Intl to Illinois
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($72 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 January 2026
Search Deals
Price to beat on a round-trip 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 January 29, 2026.
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

Sun 4/5

6:05 am-11:00 am

1 stop12h 55m

Chicago O'Hare Intl

Sat 4/11

7:05 pm-1:05 am

1 stop22h 00m

$609

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Fri 4/3

6:05 am-11:00 am

1 stop12h 55m

Chicago O'Hare Intl

Thu 4/16

4:05 pm-4:30 pm

1 stop16h 25m

$614

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Fri 3/6

5:55 am-11:10 am

1 stop13h 15m

Chicago O'Hare Intl

Tue 4/7

9:40 pm-6:35 pm

1 stop12h 55m

$614

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Fri 2/13

5:55 am-1:25 pm

1 stop15h 30m

Chicago O'Hare Intl

Mon 3/2

3:51 pm-6:35 pm

2 stops18h 44m

$615

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sat 3/14

5:55 am-12:10 pm

1 stop13h 15m

Chicago O'Hare Intl

Sat 3/21

4:20 pm-2:05 pm

1 stop14h 45m

$615

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Fri 2/13

5:55 am-1:25 pm

1 stop15h 30m

Chicago O'Hare Intl

Thu 2/26

6:50 pm-12:25 am

1 stop21h 35m

$616

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Tue 3/24

5:55 am-12:10 pm

1 stop13h 15m

Chicago O'Hare Intl

Tue 4/28

9:40 pm-1:10 am

1 stop19h 30m

$616

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Thu 2/12

5:50 am-3:20 pm

1 stop17h 30m

Chicago O'Hare Intl

Thu 3/5

1:06 pm-2:05 pm

2 stops16h 59m

$616

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Fri 2/13

5:55 am-1:25 pm

1 stop15h 30m

Chicago O'Hare Intl

Fri 3/6

2:35 pm-2:10 pm

2 stops15h 35m

$616

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Thu 2/12

5:50 am-3:20 pm

1 stop17h 30m

Chicago O'Hare Intl

Tue 3/3

4:05 pm-1:55 pm

1 stop13h 50m

$616

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 46 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 December is currently the most expensive (average of $630). 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.

How much does it cost to fly round-trip from Bucharest Otopeni Intl Airport to Illinois?

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 January 29, 2026.
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
1,443 reviews

Food

7.3

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
LOT
7.5
Good
1,174 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Turkish Airlines
7.3
Good
4,208 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,756 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,705 reviews
KLM
7.7
Good
1,443 reviews

Food

7.3

Boarding

7.8

Comfort

7.6

Overall

7.7

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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?

    United Airlines, British Airways, and Delta can get you from Bucharest Otopeni Intl Airport to Illinois in just under 12h 55m. Your travel time can differ by up to 10h 53m. Airlines will cover a distance of 5198 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 $615 and $668 on Lufthansa and SWISS, 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 $457. On average you can expect to pay $469. The most popular route, (Bucharest Otopeni Intl - Chicago O'Hare Intl), can usually be booked for $609.

  • 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 December is currently the most expensive (average of $630). 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$336Average$733FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$548Average$595FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$565Average$802FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$571Average$788FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$581Average$693FlexibilityNo cancel feeOn-time70%
LOTCheapest$584Average$667FlexibilityNo cancel feeOn-time81%
KLMCheapest$606Average$834FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$621Average$662FlexibilityNo cancel feeOn-time77%
DeltaCheapest$623Average$634FlexibilityNo cancel feeOn-timeN/A

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