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Cheap flights from Bucharest Otopeni Intl Airport to Illinois from $362

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Bucharest Otopeni Intl Airport to Illinois departing on 12/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Bucharest Otopeni Intl Airport to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:30 am - 6:25 pmOTP-STL
19h 55m2 stops
Multiple Airlines Logo
1:30 pm - 6:05 pmSTL-OTP
20h 35m2 stops
$639Multiple Airlines
Find Deal
Thu, May 14 - Tue, May 19
Lufthansa Logo
5:55 am - 8:23 pmOTP-STL
22h 28m2 stops
Lufthansa Logo
1:11 pm - 6:35 pmSTL-OTP
21h 24m2 stops
$646Lufthansa
Find Deal
Fri, Feb 20 - Tue, Feb 24
United Airlines Logo
5:55 am - 10:00 pmOTP-STL
24h 05m2 stops
United Airlines Logo
1:11 pm - 1:55 pmSTL-OTP
16h 44m2 stops
$649United Airlines
Find Deal
Fri, Feb 20 - Tue, Feb 24
American Airlines Logo
8:00 am - 3:25 pmOTP-ORD
15h 25m1 stop
American Airlines Logo
2:50 pm - 11:30 pmORD-OTP
24h 40m2 stops
$671American Airlines
Find Deal
Tue, Dec 9 - Wed, Jan 7
British Airways Logo
8:00 am - 5:00 pmOTP-ORD
17h 00m1 stop
British Airways Logo
4:33 pm - 3:45 pmORD-OTP
15h 12m2 stops
$673British Airways
Find Deal
Thu, Dec 11 - Wed, Jan 7
Multiple Airlines Logo
5:15 pm - 1:30 pmOTP-STL
28h 15m1 stop
Multiple Airlines Logo
1:30 pm - 6:05 pmSTL-OTP
20h 35m2 stops
$674Multiple Airlines
Find Deal
Thu, May 14 - Tue, May 19
American Airlines Logo
8:00 am - 7:22 pmOTP-ORD
19h 22m2 stops
American Airlines Logo
1:12 pm - 8:00 pmORD-OTP
22h 48m2 stops
$676American Airlines
Find Deal
Tue, Dec 9 - Wed, Jan 7
British Airways Logo
4:00 pm - 7:27 pmOTP-ORD
35h 27m2 stops
British Airways Logo
8:18 pm - 3:45 pmORD-OTP
35h 27m2 stops
$678British Airways
Find Deal
Sat, Dec 13 - Tue, Jan 6
KLM Logo
6:00 pm - 2:20 pmOTP-ORD
28h 20m1 stop
KLM Logo
4:25 pm - 11:30 pmORD-OTP
23h 05m1 stop
$693KLM
Find Deal
Sun, Dec 14 - Sat, Jan 17
KLM Logo
6:00 am - 4:16 pmOTP-MDW
18h 16m2 stops
KLM Logo
1:28 pm - 1:00 pmMDW-OTP
15h 32m2 stops
$715KLM
Find Deal
Sat, Jan 24 - Sat, Feb 21

American Airlines flights from Bucharest Otopeni Intl Airport to Illinois

Our best American Airlines deals on Bucharest Otopeni Intl Airport to Illinois flight tickets
American Airlines
Dec 9
OTP8:00 amBucharest Otopeni Intl
15h 25m
1 stop
ORD3:25 pmChicago O'Hare Intl
Jan 7
ORD2:50 pmChicago O'Hare Intl
24h 40m
2 stops
OTP11:30 pmBucharest Otopeni Intl
$671
Find similar
American Airlines
Dec 9
OTP8:00 amBucharest Otopeni Intl
19h 22m
2 stops
ORD7:22 pmChicago O'Hare Intl
Jan 7
ORD1:12 pmChicago O'Hare Intl
22h 48m
2 stops
OTP8:00 pmBucharest Otopeni Intl
$676
Find similar
American Airlines
Feb 10
OTP8:00 amBucharest Otopeni Intl
20h 04m
2 stops
ORD8:04 pmChicago O'Hare Intl
Jun 9
ORD5:00 pmChicago O'Hare Intl
24h 25m
1 stop
OTP1:25 amBucharest Otopeni Intl
$697
Find similar

British Airways flights from Bucharest Otopeni Intl Airport to Illinois

Our best British Airways deals on Bucharest Otopeni Intl Airport to Illinois flight tickets
British Airways
Dec 11
OTP8:00 amBucharest Otopeni Intl
17h 00m
1 stop
ORD5:00 pmChicago O'Hare Intl
Jan 7
ORD4:33 pmChicago O'Hare Intl
15h 12m
2 stops
OTP3:45 pmBucharest Otopeni Intl
$673
Find similar
British Airways
Dec 11
OTP8:00 amBucharest Otopeni Intl
23h 46m
2 stops
ORD11:46 pmChicago O'Hare Intl
Jan 6
ORD9:10 pmChicago O'Hare Intl
34h 35m
2 stops
OTP3:45 pmBucharest Otopeni Intl
$678
Find similar
British Airways
Dec 10
OTP8:05 amBucharest Otopeni Intl
23h 30m
2 stops
ORD11:35 pmChicago O'Hare Intl
Jan 6
ORD9:10 pmChicago O'Hare Intl
34h 35m
2 stops
OTP3:45 pmBucharest Otopeni Intl
$685
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Bucharest Otopeni Intl Airport 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, momondo users made 832,500 searches. Data last updated November 29, 2025.
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

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Thu 5/14

6:30 am-6:25 pm

2 stops19h 55m

Lambert-St Louis

Tue 5/19

1:30 pm-6:05 pm

2 stops20h 35m

$639

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Fri 2/20

5:55 am-8:23 pm

2 stops22h 28m

Lambert-St Louis

Tue 2/24

1:11 pm-6:35 pm

2 stops21h 24m

$646

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Fri 2/20

5:55 am-10:00 pm

2 stops24h 05m

Lambert-St Louis

Tue 2/24

1:11 pm-1:55 pm

2 stops16h 44m

$649

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Tue 12/9

8:00 am-3:25 pm

1 stop15h 25m

Chicago O'Hare Intl

Wed 1/7

2:50 pm-11:30 pm

2 stops24h 40m

$671

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Thu 12/11

8:00 am-5:00 pm

1 stop17h 00m

Chicago O'Hare Intl

Wed 1/7

4:33 pm-3:45 pm

2 stops15h 12m

$673

BucharestSt. Louis

OTP - STL

OTPSTL

Bucharest Otopeni Intl

Thu 5/14

5:15 pm-1:30 pm

1 stop28h 15m

Lambert-St Louis

Tue 5/19

1:30 pm-6:05 pm

2 stops20h 35m

$674

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Tue 12/9

8:00 am-7:22 pm

2 stops19h 22m

Chicago O'Hare Intl

Wed 1/7

1:12 pm-8:00 pm

2 stops22h 48m

$676

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sat 12/13

4:00 pm-7:27 pm

2 stops35h 27m

Chicago O'Hare Intl

Tue 1/6

8:18 pm-3:45 pm

2 stops35h 27m

$678

BucharestChicago

OTP - ORD

OTPORD

Bucharest Otopeni Intl

Sun 12/14

6:00 pm-2:20 pm

1 stop28h 20m

Chicago O'Hare Intl

Sat 1/17

4:25 pm-11:30 pm

1 stop23h 05m

$693

BucharestChicago

OTP - MDW

OTPMDW

Bucharest Otopeni Intl

Sat 1/24

6:00 am-4:16 pm

2 stops18h 16m

Chicago Midway

Sat 2/21

1:28 pm-1:00 pm

2 stops15h 32m

$715

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

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

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Bucharest Otopeni Intl Airport is in March. Flight prices, which tend to average around $568, 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 March, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $589.

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 Tuesday when prices can be found for as low as $676. Flights from Bucharest Otopeni Intl Airport to Illinois on a Saturday will generally be more expensive and average around $767. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Bucharest Otopeni Intl Airport to Illinois during this time can be as low as $511. Flights in the evening are often more expensive with an average ticket price of $802.

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 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 $712 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 $634 on momondo.

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

There are 2 cabin classes available to choose from on Bucharest Otopeni Intl 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

Fastest flight time

16h 55m

Direct flights

None
The fastest flight from Bucharest Otopeni Intl Airport to Illinois takes 16h 55m
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

  • 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?

  • 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?

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
Turkish AirlinesPriceFrom $493Free CancellationRating
7.3
4,069 reviews
Search Turkish Airlines flights
American AirlinesPriceFrom $548Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights
LufthansaPriceFrom $565Free CancellationRating
6.8
7,598 reviews
Search Lufthansa flights
KLMPriceFrom $570Free CancellationRating
7.7
1,424 reviews
Search KLM flights
United AirlinesPriceFrom $571Free CancellationRating
7.4
9,056 reviews
Search United Airlines flights
British AirwaysPriceFrom $581Free CancellationRating
6.7
7,545 reviews
Search British Airways flights
LOTPriceFrom $584Free CancellationRating
7.5
1,140 reviews
Search LOT flights
Air FrancePriceFrom $621Free CancellationRating
7.4
1,500 reviews
Search Air France flights
DeltaPriceFrom $623Free CancellationRating
7.9
8,010 reviews
Search Delta 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.

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