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Otopeni Intl

$323+ Cheap flights from Illinois to Otopeni Intl (OTP)

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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OTP
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Illinois to Otopeni Intl

Cheapest flights from Illinois to Otopeni Intl
Explore the most affordable flight options available from Illinois to Otopeni Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:10 pmORD - OTP
1 stop24h 15mSWISS
Fri 1/94:40 pmOTP - ORD
2 stops32h 20mSWISS
Deal found 12/15$598
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:00 pmORD - OTP
1 stop16h 35mLufthansa
Sat 1/107:20 pmOTP - ORD
2 stops26h 50mLufthansa
Deal found 12/15$684
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:10 pmORD - OTP
1 stop24h 15mSWISS
Thu 1/84:40 pmOTP - ORD
2 stops56h 20mSWISS
Deal found 12/15$688
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:10 pmORD - OTP
2 stops22h 55mLufthansa
Sat 1/107:20 pmOTP - ORD
2 stops26h 50mLufthansa
Deal found 12/15$710
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:10 pmORD - OTP
2 stops23h 40mAustrian Airlines
Sat 1/101:20 pmOTP - ORD
2 stops55h 25mAustrian Airlines
Deal found 12/15$715
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:00 pmORD - OTP
1 stop16h 35mLufthansa
Fri 1/97:20 pmOTP - ORD
2 stops29h 40mLufthansa
Deal found 12/15$788
This Gurufare deal was found by Cheapflights users on 12/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:10 pmORD - OTP
1 stop24h 15mMultiple Airlines
Thu 1/82:45 pmOTP - ORD
1 stop32h 35mMultiple Airlines
Deal found 12/15$799
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:10 pmORD - OTP
1 stop24h 15mSWISS
Sat 1/104:40 pmOTP - ORD
2 stops53h 30mSWISS
Deal found 12/15$802
This SmartFares deal was found by Cheapflights users on 12/17. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/263:50 pmSTL - OTP
1 stop14h 20mLufthansa
Wed 12/316:05 amOTP - STL
1 stop15h 50mLufthansa
Deal found 12/17$1,670
This Gurufare deal was found by Cheapflights users on 12/17. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:35 pmSTL - OTP
2 stops45h 20mLufthansa
Wed 12/312:40 pmOTP - STL
2 stops33h 47mLufthansa
Deal found 12/17$1,770
This Delta deal was found by Cheapflights users on 12/15. 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.
Fri 12/269:29 amMDW - OTP
2 stops19h 31mDelta
Thu 1/86:00 amOTP - MDW
2 stops18h 29mDelta
Deal found 12/15$1,770
This Ovago deal was found by Cheapflights users on 12/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:35 pmSTL - OTP
2 stops45h 20mLufthansa
Sun 12/285:55 amOTP - STL
1 stop16h 00mLufthansa
Deal found 12/16$1,801

Find flight deals from Illinois to Otopeni Intl

Keep the following information in mind while searching for Illinois to Otopeni Intl flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$494
(Kiwi.com)

One-way from

$323
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$995

Good round-trip deal

$814 or less

Good one-way deal

$218 or less
Provider with most accurate pricing for Chicago (CHI)-Bucharest (BUH) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Bucharest (BUH) flights.
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From Illinois to Bucharest Otopeni Intl
Search Deals
One-way flight from Illinois to Bucharest Otopeni Intl
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($272 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 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 Illinois to Bucharest Otopeni Intl.
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Price to beat on a one-way flight from Illinois to Bucharest Otopeni Intl.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Otopeni 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 December 18, 2025.
Use the filters below to find and compare flights from Illinois to Bucharest Otopeni Intl Airport that are best for you.

Fly from

Illinois

Fly to

Otopeni Intl

Route

Depart

Return

Price

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 1/30

3:50 pm-2:10 pm

1 stop14h 20m

Bucharest Otopeni Intl

Fri 2/6

5:55 am-11:59 pm

2 stops26h 04m

$494

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Wed 4/1

7:50 pm-8:25 pm

1 stop16h 35m

Bucharest Otopeni Intl

Wed 4/8

9:30 am-6:15 pm

1 stop16h 45m

$523

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Fri 1/30

4:05 pm-2:10 pm

1 stop14h 05m

Bucharest Otopeni Intl

Fri 2/6

5:55 am-1:25 pm

1 stop15h 30m

$534

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 1/30

12:11 pm-11:25 pm

2 stops27h 14m

Bucharest Otopeni Intl

Fri 2/6

4:45 pm-6:13 pm

2 stops33h 28m

$537

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Thu 3/12

12:50 pm-2:10 pm

1 stop18h 20m

Bucharest Otopeni Intl

Sun 3/22

3:30 pm-7:25 pm

1 stop34h 55m

$541

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Wed 2/4

9:50 pm-6:35 pm

1 stop12h 45m

Bucharest Otopeni Intl

Wed 2/11

6:05 am-7:45 pm

2 stops21h 40m

$549

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Wed 4/1

7:50 pm-2:35 pm

1 stop34h 45m

Bucharest Otopeni Intl

Wed 5/6

3:55 pm-6:15 pm

1 stop34h 20m

$549

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Fri 1/30

3:50 pm-2:10 pm

1 stop14h 20m

Bucharest Otopeni Intl

Tue 2/3

5:55 am-3:15 pm

2 stops41h 20m

$555

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Mon 4/20

9:40 pm-1:00 am

1 stop19h 20m

Bucharest Otopeni Intl

Sun 4/26

1:50 pm-7:55 pm

1 stop14h 05m

$559

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Sat 1/24

11:39 am-11:45 pm

2 stops28h 06m

Bucharest Otopeni Intl

Sat 2/7

4:00 pm-1:50 pm

1 stop29h 50m

$562

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 42 results
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Best time to book a flight from Illinois to Otopeni Intl

Have a flexible travel schedule? Discover the best time to fly to Otopeni Intl from Illinois 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 Illinois to Bucharest Otopeni Intl Airport

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

Currently, April is the cheapest month in which you can book a flight from Illinois to Bucharest Otopeni Intl Airport (average of $334). Flying from Illinois to Bucharest Otopeni Intl Airport in June is currently the most expensive (average of $759). 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 IL to OTP?

Find hourly flight availability from Illinois to Otopeni Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

It’s typically best to fly out from Illinois to Bucharest Otopeni Intl Airport in the afternoon. Doing so could potentially save you 38% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Illinois to Bucharest Otopeni Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Otopeni Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Bucharest Otopeni Intl Airport flight should consider departing on Friday at noon when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Otopeni Intl. 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 Illinois to Bucharest Otopeni Intl Airport?

    A quick flight from Illinois to Bucharest Otopeni Intl Airport can take about 14h 20m. Lufthansa provides one of the quickest options available for as low as $494. There are 5451 mi between Illinois and Bucharest Otopeni Intl Airport. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is Turkish Airlines, with whom users have recently found tickets for as low as $287. However, be on the lookout for offers from Lufthansa and Austrian Airlines, as they are both options that can get you from Illinois to Bucharest Otopeni Intl Airport for a low price.

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

    The most popular flight routes from Illinois to Bucharest Otopeni Intl Airport are Chicago O'Hare Intl - Bucharest Otopeni Intl, Chicago Midway - Bucharest Otopeni Intl and Lambert-St Louis - Bucharest Otopeni Intl.

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

    While on average a flight from Illinois to Bucharest Otopeni Intl Airport is generally $632, our data shows the cheapest flight currently is $218. When looking at the most popular route, (Chicago O'Hare Intl - Bucharest Otopeni Intl), you can expect to pay $516 for that flight.

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

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

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

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

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

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

    Currently, April is the cheapest month in which you can book a flight from Illinois to Bucharest Otopeni Intl Airport (average of $334). Flying from Illinois to Bucharest Otopeni Intl Airport in June is currently the most expensive (average of $759). 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 Bucharest Otopeni Intl Airport?

Book flights to Bucharest Otopeni Intl Airport if you plan to visit one of these locations
Otopeni

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Alternative routes for Illinois to Otopeni Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Illinois to Otopeni Intl

Discover the top 10 airlines that operate flights from Illinois to Otopeni 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$385Average$695FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$503Average$592FlexibilityNo cancel feeOn-time77%
Austrian AirlinesCheapest$517Average$732FlexibilityNo cancel feeOn-time78%
LOTCheapest$538Average$890FlexibilityNo cancel feeOn-time81%
KLMCheapest$568Average$894FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$569Average$749FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$570Average$871FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$575Average$795FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$595Average$900FlexibilityNo cancel feeOn-time69%
SWISSCheapest$597Average$806FlexibilityNo cancel feeOn-time79%

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