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Otopeni Intl

$263+ 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 6/21. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — OTP
Jun 26 — Jul 31
Fri 6/26
Fri 7/3
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 May 27, 2026.

This Lufthansa deal was found by Cheapflights users on 5/22. 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.
Sun 8/166:54 pm
STL
-
OTP
2 stops15h 41m
Lufthansa
Fri 8/281:45 pm
OTP
-
STL
2 stops17h 14m
Lufthansa
Deal found 5/22$647
This Lufthansa deal was found by Cheapflights users on 5/22. 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.
Mon 8/1712:59 pm
STL
-
OTP
2 stops15h 01m
Lufthansa
Sat 8/296:05 am
OTP
-
STL
2 stops17h 26m
Lufthansa
Deal found 5/22$707
This Mytrip deal was found by Cheapflights users on 5/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/234:00 pm
ORD
-
OTP
2 stops18h 35m
Multiple Airlines
Mon 12/77:20 pm
OTP
-
ORD
1 stop31h 05m
Multiple Airlines
Deal found 5/23$727
This Air Serbia deal was found by Cheapflights users on 5/22. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/124:40 pm
ORD
-
OTP
1 stop14h 40m
Air Serbia
Sat 10/174:05 pm
OTP
-
ORD
1 stop13h 10m
Air Serbia
Deal found 5/22$729
This Air Serbia deal was found by Cheapflights users on 5/25. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:20 pm
ORD
-
OTP
1 stop32h 00m
Air Serbia
Mon 8/314:30 am
OTP
-
ORD
1 stop18h 00m
Air Serbia
Deal found 5/25$730
This Air Serbia deal was found by Cheapflights users on 5/26. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:20 pm
ORD
-
OTP
1 stop19h 45m
Air Serbia
Sun 8/304:05 pm
OTP
-
ORD
1 stop30h 25m
Air Serbia
Deal found 5/26$732
This Delta deal was found by Cheapflights users on 5/22. 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.
Sun 11/1510:30 am
ORD
-
OTP
2 stops19h 40m
Delta
Wed 11/186:00 am
OTP
-
ORD
1 stop16h 25m
Delta
Deal found 5/22$733
This American Airlines deal was found by Cheapflights users on 5/24. 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.
Tue 11/242:03 pm
ORD
-
OTP
2 stops16h 42m
American Airlines
Tue 12/88:00 am
OTP
-
ORD
1 stop19h 15m
American Airlines
Deal found 5/24$735
This Air Serbia deal was found by Cheapflights users on 5/22. 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 Serbia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2211:20 pm
ORD
-
OTP
1 stop32h 00m
Air Serbia
Sun 9/64:05 pm
OTP
-
ORD
1 stop30h 25m
Air Serbia
Deal found 5/22$740
This FlightHub deal was found by Cheapflights users on 5/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2710:40 am
ORD
-
OTP
2 stops22h 10m
Air Canada
Tue 11/106:30 am
OTP
-
ORD
2 stops19h 57m
Air Canada
Deal found 5/26$741
This SWISS deal was found by Cheapflights users on 5/22. 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.
Tue 12/299:50 pm
ORD
-
OTP
2 stops18h 40m
SWISS
Mon 1/114:40 pm
OTP
-
ORD
1 stop28h 00m
SWISS
Deal found 5/22$742
This Delta deal was found by Cheapflights users on 5/22. 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 10/2010:40 am
ORD
-
OTP
2 stops18h 05m
Delta
Tue 11/36:00 am
OTP
-
ORD
2 stops23h 33m
Delta
Deal found 5/22$743

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 May 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$647
(Lufthansa)

One-way from

$263
(SWISS)

Popular in

May

Cheapest in

October

Average price

$1,214

Good round-trip deal

$867 or less

Good one-way deal

$435 or less
Provider with most accurate pricing for Chicago (CHI)-Bucharest (BUH) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Bucharest (BUH) flights.
Search Deals
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. 17% potential increase in price ($160 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Bucharest Otopeni Intl.
Search Deals
Price to beat on a one-way flight from Illinois to Bucharest Otopeni Intl.
Search Deals

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 May 27, 2026.
Use the filters below to find and compare flights from Illinois to Bucharest Otopeni Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBucharest

STL - OTP

STLOTP

Lambert-St Louis

Sun 8/16

6:54 pm-6:35 pm

2 stops15h 41m

Bucharest Otopeni Intl

Fri 8/28

1:45 pm-10:59 pm

2 stops17h 14m

$647

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Wed 8/12

10:28 am-1:40 pm

2 stops19h 12m

Bucharest Otopeni Intl

Wed 8/26

7:05 am-2:30 pm

1 stop15h 25m

$787

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Sat 8/1

6:30 am-1:40 pm

2 stops23h 10m

Bucharest Otopeni Intl

Tue 8/25

2:00 pm-2:30 pm

1 stop32h 30m

$788

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Sun 8/9

5:10 pm-10:35 pm

1 stop21h 25m

Bucharest Otopeni Intl

Sat 8/22

8:40 am-3:10 pm

1 stop14h 30m

$790

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Sun 8/9

5:10 pm-1:40 pm

1 stop12h 30m

Bucharest Otopeni Intl

Sat 8/22

2:00 pm-12:02 am

2 stops18h 02m

$794

ChicagoBucharest

MDW - OTP

MDWOTP

Chicago Midway

Tue 10/20

12:30 pm-12:45 pm

2 stops16h 15m

Bucharest Otopeni Intl

Tue 10/27

6:00 am-4:50 pm

2 stops17h 50m

$796

ChicagoBucharest

ORD - OTP

ORDOTP

Chicago O'Hare Intl

Sun 8/9

7:25 pm-5:40 pm

2 stops14h 15m

Bucharest Otopeni Intl

Sat 8/22

8:40 am-3:10 pm

1 stop14h 30m

$800

ChicagoBucharest

MDW - OTP

MDWOTP

Chicago Midway

Wed 8/26

9:59 am-1:00 pm

2 stops19h 01m

Bucharest Otopeni Intl

Wed 9/9

7:05 am-9:46 pm

2 stops22h 41m

$800

ChicagoBucharest

MDW - OTP

MDWOTP

Chicago Midway

Wed 9/2

10:54 am-1:00 pm

2 stops18h 06m

Bucharest Otopeni Intl

Wed 9/16

7:05 am-10:25 pm

2 stops23h 20m

$800

ChicagoBucharest

MDW - OTP

MDWOTP

Chicago Midway

Wed 9/2

1:00 pm-12:45 pm

2 stops15h 45m

Bucharest Otopeni Intl

Fri 9/18

2:00 pm-9:50 am

2 stops27h 50m

$802

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/26

Showing 1-10 of 56 resultsSorted by cheapest first
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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, July is the cheapest month in which you can book a flight from Illinois to Bucharest Otopeni Intl Airport (average of $278). Flying from Illinois to Bucharest Otopeni Intl Airport in December is currently the most expensive (average of $539). 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 Illinois to Bucharest Otopeni Intl Airport?

How far ahead should I book a flight from Illinois to Bucharest Otopeni Intl Airport?

The price you pay for your flight from Illinois to Bucharest Otopeni Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 69 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 15h 41m. Lufthansa provides one of the quickest options available for as low as $647. 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 Austrian Airlines, with whom users have recently found tickets for as low as $251. However, be on the lookout for offers from KLM and Lufthansa, 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 $691, our data shows the cheapest flight currently is $421. When looking at the most popular route, (Chicago O'Hare Intl - Bucharest Otopeni Intl), you can expect to pay $723 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, July is the cheapest month in which you can book a flight from Illinois to Bucharest Otopeni Intl Airport (average of $278). Flying from Illinois to Bucharest Otopeni Intl Airport in December is currently the most expensive (average of $539). 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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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 May 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$300Average$727FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$440Average$772FlexibilityNo cancel feeOn-time70%
Turkish AirlinesCheapest$504Average$595FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$535Average$742FlexibilityNo cancel feeOn-time76%
Air SerbiaCheapest$537Average$746FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$539Average$789FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$569Average$950FlexibilityNo cancel feeOn-time77%
SWISSCheapest$569Average$875FlexibilityNo cancel feeOn-time79%
DeltaCheapest$575Average$1,013FlexibilityNo cancel feeOn-timeN/A
LOTCheapest$586Average$908FlexibilityNo cancel feeOn-time81%

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