What is the cheapest airline that flies from Bucharest Otopeni Intl to Illinois?

Air Serbia is the most popular carrier operating from Bucharest Otopeni Intl to Illinois

What airlines fly to Illinois?

LOT, KLM and Lufthansa are the top three most popular airlines that fly to Illinois from Bucharest Otopeni Intl Airport according to our data. LOT is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many operators does momondo search for flights from Bucharest Otopeni Intl Airport to Illinois?

There are 6 operators available for flights from Bucharest Otopeni Intl Airport to Illinois as of November 2026.

How old do you have to be to fly from Bucharest Otopeni Intl Airport to Illinois?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bucharest Otopeni Intl Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$436 Cheap Flights from Bucharest Otopeni Intl Airport to Illinois in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Bucharest Otopeni Intl Airport to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 pm - 7:55 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

33h 25m1 stop Warsaw Frederic Chopin

9:50 pm - 1:50 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

32h 00m1 stop Warsaw Frederic Chopin

$759LOT

Thu, Dec 24 - Fri, Jan 8

11:10 am - 3:30 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

36h 20m2 stops Malaga Lisbon Humberto Delgado

6:50 pm - 3:50 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

13h 00m1 stop Zurich

$760Multiple Airlines

Sat, Nov 21 - Sun, Feb 21

11:10 am - 3:30 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

36h 20m2 stops Malaga Lisbon Humberto Delgado

6:50 pm - 3:50 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

13h 00m1 stop Zurich

$760Multiple Airlines

Sat, Nov 21 - Tue, Feb 23

6:30 pm - 7:55 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

33h 25m1 stop Warsaw Frederic Chopin

9:50 pm - 5:45 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

11h 55m1 stop Warsaw Frederic Chopin

$762LOT

Tue, Dec 22 - Thu, Jan 7

9:45 pm - 10:00 amOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

20h 15m1 stop Istanbul

8:15 pm - 2:15 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

34h 00m1 stop Istanbul

$806Turkish Airlines

Sun, Nov 15 - Sat, Nov 28

6:00 am - 2:25 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

16h 25m1 stop Amsterdam Schiphol

4:25 pm - 1:00 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

12h 35m1 stop Amsterdam Schiphol

$817KLM

Wed, Dec 2 - Thu, Dec 24

6:00 am - 2:25 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

16h 25m1 stop Amsterdam Schiphol

4:25 pm - 1:00 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

12h 35m1 stop Amsterdam Schiphol

$817KLM

Sun, Nov 22 - Sat, Feb 20

9:35 pm - 10:00 amOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

20h 25m1 stop Istanbul

9:15 pm - 8:15 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

15h 00m1 stop Istanbul

$834Turkish Airlines

Tue, Dec 8 - Wed, Mar 10

5:55 am - 3:20 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

17h 25m1 stop Frankfurt am Main

4:20 pm - 1:55 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

13h 35m1 stop Frankfurt am Main

$867United Airlines

Fri, Nov 20 - Thu, Feb 18

6:00 am - 1:10 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

15h 10m1 stop Frankfurt am Main

4:20 pm - 1:55 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

13h 35m1 stop Frankfurt am Main

$867United Airlines

Thu, Nov 19 - Mon, Feb 22

Cheap last minute flights

Enter your travel dates to find the best prices.

7:55 pm - 3:30 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

27h 35m2 stops Malaga Lisbon Humberto Delgado

5:30 pm - 3:05 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

13h 35m1 stop Belgrade Nikola Tesla

$759Multiple Airlines

Thu, Nov 5 - Sat, Dec 5

7:55 pm - 3:30 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

27h 35m2 stops Malaga Lisbon Humberto Delgado

5:30 pm - 3:05 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

13h 35m1 stop Belgrade Nikola Tesla

$771Multiple Airlines

Thu, Nov 5 - Sat, Dec 5

3:35 pm - 10:00 amOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

26h 25m1 stop Istanbul

11:45 am - 2:15 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

18h 30m1 stop Istanbul

$834Turkish Airlines

Mon, Nov 9 - Tue, Dec 1

3:35 pm - 10:00 amOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

26h 25m1 stop Istanbul

11:45 am - 8:40 amORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

12h 55m1 stop Istanbul

$835Turkish Airlines

Mon, Nov 9 - Mon, Dec 7

5:55 am - 7:29 amOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

33h 34m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

9:50 pm - 6:30 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

12h 40m1 stop Munich Franz Josef Strauss

$874United Airlines

Sat, Nov 7 - Sun, Nov 29

5:55 am - 7:29 amOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

33h 34m2 stops Frankfurt am Main Washington, D.C. Dulles Intl

6:10 pm - 11:55 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

21h 45m1 stop Frankfurt am Main

$875United Airlines

Sat, Nov 7 - Fri, Dec 4

6:00 am - 2:25 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

16h 25m1 stop Amsterdam Schiphol

2:41 pm - 1:00 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

14h 19m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

$878KLM

Sat, Nov 7 - Thu, Dec 3

6:00 am - 2:25 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

16h 25m1 stop Amsterdam Schiphol

5:02 pm - 3:25 pmORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

14h 23m2 stops Detroit Metropolitan Wayne County Amsterdam Schiphol

$878KLM

Mon, Nov 9 - Sun, Dec 6

8:20 am - 7:55 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

19h 35m1 stop Warsaw Frederic Chopin

9:50 pm - 1:45 amORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

19h 55m1 stop Warsaw Frederic Chopin

$1,100LOT

Fri, Nov 6 - Mon, Nov 30

5:35 am - 7:55 pmOTP Bucharest Otopeni Intl-ORD Chicago O'Hare Intl

22h 20m1 stop Warsaw Frederic Chopin

9:50 pm - 1:45 amORD Chicago O'Hare Intl-OTP Bucharest Otopeni Intl

19h 55m1 stop Warsaw Frederic Chopin

$1,148LOT

Wed, Nov 4 - Mon, Nov 30

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Delta flights from Bucharest Otopeni Intl Airport to Illinois

Our best Delta deals on Bucharest Otopeni Intl Airport to Illinois flight tickets

Delta

Nov 22

OTP6:00 amBucharest Otopeni Intl

16h 25m

1 stop

ORD2:25 pmChicago O'Hare Intl

Dec 8

ORD6:25 pmChicago O'Hare Intl

20h 50m

1 stop

OTP11:15 pmBucharest Otopeni Intl

$772

Delta

Nov 19

OTP6:00 amBucharest Otopeni Intl

16h 25m

1 stop

ORD2:25 pmChicago O'Hare Intl

Feb 19

ORD9:48 amChicago O'Hare Intl

20h 22m

2 stops

OTP2:10 pmBucharest Otopeni Intl

$775

Delta

Nov 17

OTP6:00 amBucharest Otopeni Intl

24h 36m

2 stops

ORD10:36 pmChicago O'Hare Intl

Dec 8

ORD6:25 pmChicago O'Hare Intl

20h 50m

1 stop

OTP11:15 pmBucharest Otopeni Intl

$778

LOT flights from Bucharest Otopeni Intl Airport to Illinois

Our best LOT deals on Bucharest Otopeni Intl Airport to Illinois flight tickets

LOT

Dec 24

OTP6:30 pmBucharest Otopeni Intl

33h 25m

1 stop

ORD7:55 pmChicago O'Hare Intl

Jan 8

ORD9:50 pmChicago O'Hare Intl

32h 00m

1 stop

OTP1:50 pmBucharest Otopeni Intl

$759

LOT

Nov 24

OTP8:20 amBucharest Otopeni Intl

19h 35m

1 stop

ORD7:55 pmChicago O'Hare Intl

Feb 23

ORD9:50 pmChicago O'Hare Intl

32h 00m

1 stop

OTP1:50 pmBucharest Otopeni Intl

$762

LOT

Dec 22

OTP5:35 amBucharest Otopeni Intl

22h 20m

1 stop

ORD7:55 pmChicago O'Hare Intl

Jan 9

ORD9:50 pmChicago O'Hare Intl

17h 35m

1 stop

OTP11:25 pmBucharest Otopeni Intl

$763

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Thu 12/24

6:30 pm-7:55 pm

1 stop33h 25m

Chicago O'Hare Intl

Fri 1/8

9:50 pm-1:50 pm

1 stop32h 00m

$759

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Sat 11/21

11:10 am-3:30 pm

2 stops36h 20m

Chicago O'Hare Intl

Sun 2/21

6:50 pm-3:50 pm

1 stop13h 00m

$760

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Sat 11/21

11:10 am-3:30 pm

2 stops36h 20m

Chicago O'Hare Intl

Tue 2/23

6:50 pm-3:50 pm

1 stop13h 00m

$760

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Tue 12/22

6:30 pm-7:55 pm

1 stop33h 25m

Chicago O'Hare Intl

Thu 1/7

9:50 pm-5:45 pm

1 stop11h 55m

$762

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Sun 11/15

9:45 pm-10:00 am

1 stop20h 15m

Chicago O'Hare Intl

Sat 11/28

8:15 pm-2:15 pm

1 stop34h 00m

$806

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Wed 12/2

6:00 am-2:25 pm

1 stop16h 25m

Chicago O'Hare Intl

Thu 12/24

4:25 pm-1:00 pm

1 stop12h 35m

$817

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Sun 11/22

6:00 am-2:25 pm

1 stop16h 25m

Chicago O'Hare Intl

Sat 2/20

4:25 pm-1:00 pm

1 stop12h 35m

$817

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Tue 12/8

9:35 pm-10:00 am

1 stop20h 25m

Chicago O'Hare Intl

Wed 3/10

9:15 pm-8:15 pm

1 stop15h 00m

$834

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Fri 11/20

5:55 am-3:20 pm

1 stop17h 25m

Chicago O'Hare Intl

Thu 2/18

4:20 pm-1:55 pm

1 stop13h 35m

$867

Quickest round-trip

BucharestChicago

OTP Bucharest Otopeni Intl - ORD Chicago O'Hare Intl

OTPORD

Bucharest Otopeni Intl

Thu 11/19

6:00 am-1:10 pm

1 stop15h 10m

Chicago O'Hare Intl

Mon 2/22

4:20 pm-1:55 pm

1 stop13h 35m

$867

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Bucharest Otopeni Intl Airport to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Bucharest Otopeni Intl Airport is in February. Flight prices, which tend to average around $661, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $679.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Bucharest Otopeni Intl Airport to Illinois is on a Saturday when prices can be found for as low as $469. Flights from Bucharest Otopeni Intl Airport to Illinois on a Thursday will generally be more expensive and average around $770. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest Bucharest Otopeni Intl to Illinois flight route?

Fly from Bucharest Otopeni Intl to Chicago O'Hare Intl for the best Bucharest Otopeni Intl - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Bucharest Otopeni Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $850 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Bucharest Otopeni Intl Airport for as low as $643 on momondo.

What cabin class options are available on Bucharest Otopeni Intl Airport to Illinois flights?

There is only 1 cabin class available to choose from on Bucharest Otopeni Intl Airport to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Bucharest Otopeni Intl Airport to Illinois flights?

No. A direct flight is the cheapest option for a flight between Bucharest Otopeni Intl Airport to Illinois.

Cheap Bucharest Otopeni Intl Airport to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Bucharest Otopeni Intl Airport to Illinois

Best Price Found	$436
Fastest flight time	16h 25m
Direct flights	None

The best one-way flight to Illinois from Bucharest Otopeni Intl Airport in the past 72 hours is $436. The best round-trip flight deal from Bucharest Otopeni Intl Airport to Illinois found on momondo in the last 72 hours is $759.

The fastest flight from Bucharest Otopeni Intl Airport to Illinois takes 16h 25m

There are no direct flights from Bucharest Otopeni Intl Airport to Illinois. There are no popular flight routes from Bucharest Otopeni Intl Airport to Illinois.

Search flight deals

Frequently asked questions about flying from Bucharest Otopeni Intl Airport to Illinois

When did momondo last update prices for flights from Bucharest Otopeni Intl Airport to Illinois?
Prices for flights from Bucharest Otopeni Intl Airport to Illinois were last updated today.
How many operators does momondo search for flights from Bucharest Otopeni Intl Airport to Illinois?
There are 6 operators available for flights from Bucharest Otopeni Intl Airport to Illinois as of November 2026.
How old do you have to be to fly from Bucharest Otopeni Intl Airport to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Bucharest Otopeni Intl Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Bucharest Otopeni Intl Airport to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Bucharest Otopeni Intl Airport to Illinois is Airbus A330, representing 85.71% of all bookings. The subsequent popular model is Airbus A330-200 at 14.29%.

Best airlines flying from Bucharest Otopeni Intl Airport to Illinois

Compare and see reviews for airlines that fly from Bucharest Otopeni Intl Airport to Illinois with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $284	Free Cancellation	Rating 7.3 10,458 reviews	Search United Airlines flights
HiSky	PriceFrom $426	Free Cancellation	Rating 0.0	Search HiSky flights
Lufthansa	PriceFrom $603	Free Cancellation	Rating 6.8 8,297 reviews	Search Lufthansa flights
Turkish Airlines	PriceFrom $608	Free Cancellation	Rating 7.4 4,466 reviews	Search Turkish Airlines flights
LOT	PriceFrom $623	Free Cancellation	Rating 7.5 1,191 reviews	Search LOT flights
KLM	PriceFrom $657	Free Cancellation	Rating 7.8 1,595 reviews	Search KLM flights

Why use momondo?

Why should I use momondo to find a flight deal from Bucharest to Illinois?

It is quick and easy to find Bucharest to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

Can I find flights from Bucharest to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Bucharest which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Bucharest to Illinois?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Bucharest.

I’m not ready to book a flight from Bucharest to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Bucharest to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.