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$343+ Cheap flights from Illinois to Barcelona

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BCN
Dec 19 — Dec 261
Fri 12/19
Fri 12/26
1 adult, Economy
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Find flight deals from Illinois to Barcelona

Cheapest flights from Illinois to Barcelona
Explore the most affordable flight options available from Illinois to Barcelona. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 19, 2025.

This Delta deal was found by Cheapflights users on 11/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:05 amSTL - BCN
1 stop18h 35mDelta
Fri 1/3010:55 amBCN - STL
1 stop19h 42mDelta
Deal found 11/16$434
This Delta deal was found by Cheapflights users on 11/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:12 pmSTL - BCN
1 stop32h 28mDelta
Thu 1/2910:15 amBCN - STL
2 stops17h 28mDelta
Deal found 11/16$438
This Mytrip deal was found by Cheapflights users on 11/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:30 pmORD - BCN
2 stops20h 00mMultiple Airlines
Tue 12/95:45 amBCN - ORD
2 stops18h 35mMultiple Airlines
Deal found 11/17$458
This Delta deal was found by Cheapflights users on 11/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/26:00 amSTL - BCN
1 stop19h 40mDelta
Wed 2/46:00 amBCN - STL
2 stops21h 43mDelta
Deal found 11/16$461
This Delta deal was found by Cheapflights users on 11/18. 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.
Wed 11/194:25 pmORD - BCN
1 stop11h 00mDelta
Tue 11/2510:55 amBCN - ORD
1 stop14h 57mDelta
Deal found 11/18$461
This Delta deal was found by Cheapflights users on 11/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/32:07 pmSTL - BCN
1 stop11h 33mDelta
Fri 1/3011:10 amBCN - STL
2 stops16h 33mDelta
Deal found 11/16$462
This Air Canada deal was found by Cheapflights users on 11/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/294:05 pmSTL - BCN
2 stops34h 30mAir Canada
Thu 1/291:35 pmBCN - STL
2 stops40h 23mAir Canada
Deal found 11/16$463
This oojo deal was found by Cheapflights users on 11/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:10 pmORD - BCN
1 stop18h 10mTAP AIR PORTUGAL
Sun 12/76:45 amBCN - ORD
1 stop15h 00mTAP AIR PORTUGAL
Deal found 11/17$463
This Delta deal was found by Cheapflights users on 11/18. 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.
Wed 11/196:40 amSTL - BCN
2 stops18h 20mDelta
Thu 12/46:00 amBCN - STL
2 stops24h 42mDelta
Deal found 11/18$465
This Mytrip deal was found by Cheapflights users on 11/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:50 pmORD - BCN
1 stop13h 45mMultiple Airlines
Mon 11/247:50 pmBCN - ORD
1 stop27h 30mMultiple Airlines
Deal found 11/16$465
This United Airlines deal was found by Cheapflights users on 11/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:50 pmORD - BCN
1 stop13h 45mUnited Airlines
Mon 12/89:55 amBCN - ORD
1 stop34h 15mUnited Airlines
Deal found 11/17$466
This United Airlines deal was found by Cheapflights users on 11/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1912:50 pmORD - BCN
1 stop13h 45mUnited Airlines
Tue 11/253:05 pmBCN - ORD
Nonstop10h 05mUnited Airlines
Deal found 11/17$469

Cheap flight deals from Illinois to Barcelona

Keep the following information in mind while searching for Illinois to Barcelona flight deals. Data was last updated November 19, 2025.

Round-trip from

$442
(Kiwi.com)

One-way from

$343
(oojo)

Popular in

June

Cheapest in

February

Average price

$567
From Illinois to Barcelona
Search Deals
One-way flight from Illinois to Barcelona
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($296 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Barcelona 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 November 19, 2025.
Use the filters below to find and compare flights from Illinois to Barcelona that are best for you.

Fly from

Illinois

Fly to

Barcelona

Route

Depart

Return

Price

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 12/1

7:05 am-8:40 am

1 stop18h 35m

Barcelona-El Prat

Fri 1/30

10:55 am-11:37 pm

1 stop19h 42m

$434

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 12/3

6:00 am-8:40 am

1 stop19h 40m

Barcelona-El Prat

Fri 1/30

10:55 am-3:56 pm

1 stop36h 01m

$434

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 12/2

11:40 am-8:40 am

1 stop14h 00m

Barcelona-El Prat

Fri 1/30

10:55 am-8:37 pm

1 stop16h 42m

$434

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 11/26

6:40 am-8:00 am

2 stops18h 20m

Barcelona-El Prat

Thu 12/4

10:55 am-11:42 pm

1 stop19h 47m

$438

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Wed 12/3

7:05 am-8:40 am

1 stop18h 35m

Barcelona-El Prat

Thu 1/29

10:15 am-11:37 pm

2 stops20h 22m

$438

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 12/2

5:12 pm-8:40 am

1 stop32h 28m

Barcelona-El Prat

Thu 1/29

10:15 am-8:43 pm

2 stops17h 28m

$438

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Tue 12/2

9:30 am-8:40 am

1 stop16h 10m

Barcelona-El Prat

Tue 2/3

10:15 am-8:37 pm

2 stops17h 22m

$438

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Sun 2/1

6:40 pm-9:35 am

2 stops31h 55m

Barcelona-El Prat

Tue 2/17

1:35 pm-9:00 pm

2 stops38h 25m

$461

ChicagoBarcelona

ORD - BCN

ORDBCN

Chicago O'Hare Intl

Tue 1/13

9:55 am-8:40 am

1 stop15h 45m

Barcelona-El Prat

Wed 1/21

6:00 am-10:34 pm

2 stops23h 34m

$461

St. LouisBarcelona

STL - BCN

STLBCN

Lambert-St Louis

Mon 12/1

7:05 am-8:40 am

1 stop18h 35m

Barcelona-El Prat

Wed 2/4

6:00 am-8:43 pm

2 stops21h 43m

$461

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 58 results
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Best time to book a flight from Illinois to Barcelona

Have a flexible travel schedule? Discover the best time to fly to Barcelona 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 Barcelona

What is the cheapest month to book a flight from Illinois to Barcelona?

Currently, August is the cheapest month in which you can book a flight from Illinois to Barcelona (average of $369). Flying from Illinois to Barcelona in June is currently the most expensive (average of $887). 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 BCN?

Find hourly flight availability from Illinois to Barcelona. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 19, 2025.

A simple way to save on the total cost of your ticket is to fly from Illinois to Barcelona in the evening. If you’re flexible enough to do this you can expect to save up to 45% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Illinois to Barcelona?

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

Travelers seeking maximum savings on their Illinois to Barcelona flight should consider departing on Monday at noon when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Barcelona

Explore weekly flight availability from Illinois to Barcelona. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 19, 2025.

The most flights from USIL to S37 are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Barcelona. 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 Barcelona?

    For as low as $469, Delta can have you in Barcelona from Illinois in 11h. There are 4405 mi between Illinois and Barcelona. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Illinois to Barcelona?

    The most popular flight routes from Illinois to Barcelona are Chicago O'Hare Intl - Barcelona-El Prat, Chicago Midway - Barcelona-El Prat and Lambert-St Louis - Barcelona-El Prat.

  • What are the most reliable airlines from Illinois to Barcelona?

    Before booking your flight to Barcelona from Illinois, check out the most reliable airlines to get you to your destination on time: American Airlines (77%), Alaska Airlines (77%), Finnair( 77%).

  • What are the cheapest flights from Illinois to Barcelona?

    On average you can expect to pay $3,041 for a flight from Illinois to Barcelona. The cheapest flight overall is $394 while the most popular route, (Chicago O'Hare Intl - Barcelona-El Prat) is currently priced at $354.

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

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

  • How can I find direct flights from Illinois to Barcelona?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Barcelona 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 Barcelona?

    Currently, August is the cheapest month in which you can book a flight from Illinois to Barcelona (average of $369). Flying from Illinois to Barcelona in June is currently the most expensive (average of $887). 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 Illinois to Barcelona

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 Barcelona

Discover the top 10 airlines that operate flights from Illinois to Barcelona. 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 November 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$366Average$478FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$369Average$540FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$401Average$584FlexibilityNo cancel feeOn-time77%
Scandinavian AirlinesCheapest$406Average$594FlexibilityNo cancel feeOn-time77%
KLMCheapest$479Average$782FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$483Average$701FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$485Average$680FlexibilityNo cancel feeOn-time70%
IberiaCheapest$486Average$822FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$490Average$714FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$500Average$816FlexibilityNo cancel feeOn-time69%

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