How long is the flight from Birmingham to Chicago?

Delta, Scandinavian Airlines, and KLM can get you from Birmingham to Chicago in just under 14h 59m. Your travel time can differ by up to 11h 56m. Birmingham and Chicago are separated by a distance of 3863 mi. This flight may include one or multiple stops.

What are the cheapest airlines flying from Birmingham to Chicago round-trip?

Cheapflights users have booked flights from Birmingham to Chicago round-trip from £374. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £464, and British Airways, from £490. Scandinavian Airlines is currently priced 44% below the average price you’ll pay for this route.

In terms of precipitation, rainfall in Chicago ranges from 43.0 - 125.0 inches per month. August is typically the wettest month, when rainfall can reach 125.0 mm. January is typically the driest time to visit Chicago when rainfall is around 43.0 mm.

If weather is an important factor for your trip to Chicago, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular airlines that fly from Birmingham to Chicago?

The most popular airlines flying from Birmingham to Chicago are Aer Lingus, Virgin Atlantic and KLM. Something to consider prior to booking your flight.

What is the cheapest time of day to fly from BHX to CHI?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Birmingham to Chicago as you normally would.

What airport do you fly from for flights from Birmingham to Chicago?

Birmingham (BHX), located 6.8 mi from the city center, is the airport you fly out of when you book flights from Birmingham to Chicago. 5 airlines have flights from Birmingham to Chicago on a regular basis. Booking flights from Birmingham to Chicago should not be difficult; the airport handles an average of 0 outbound flights to Chicago per day.

Can I find deals for flights from Birmingham to Chicago that include hotel bookings?

Yes. In addition to deals on Birmingham to Chicago flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Birmingham to Chicago?

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

Can I find deals for business class flights from Birmingham to Chicago?

Yes. Cheapflights offers flight deals from Birmingham to Chicago by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£310+ Cheap Flights from Birmingham to Chicago

Cheap flight deals from Birmingham to Chicago

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Birmingham to Chicago
Explore the most affordable flight options available from Birmingham to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Wed 30/908:25 -

2 stops34h 15m

Wed 7/1018:00 -

2 stops23h 55m

Deal found 16/8£455

Wed 23/908:10 -

2 stops16h 05m

Sun 4/1019:25 -

2 stops16h 45m

Deal found 18/8£481

Wed 4/1108:35 -

1 stop11h 25m

Sat 14/1115:55 -

1 stop11h 05m

Deal found 17/8£486

Wed 23/908:10 -

1 stop11h 50m

Sun 4/1015:45 -

1 stop14h 05m

Deal found 18/8£489

Wed 9/908:10 -

1 stop17h 05m

Wed 23/915:45 -

1 stop21h 20m

Deal found 18/8£505

Mon 19/1011:45 -

3 stops34h 25m

Mon 26/1020:15 -

2 stops21h 30m

Deal found 18/8£506

Wed 16/915:00 -

2 stops31h 10m

Tue 29/919:15 -

2 stops19h 30m

Deal found 19/8£510

Sun 6/908:10 -

1 stop11h 50m

Mon 21/921:00 -

1 stop13h 05m

Deal found 17/8£517

Wed 4/1106:00 -

2 stops16h 47m

Sat 14/1113:22 -

2 stops14h 23m

Deal found 17/8£619

Wed 2/905:55 -

2 stops17h 04m

Sun 6/917:45 -

2 stops18h 05m

Deal found 18/8£619

Wed 30/905:55 -

2 stops18h 38m

Wed 7/1009:29 -

2 stops17h 06m

Deal found 16/8£622

Tue 15/905:55 -

2 stops18h 38m

Tue 22/909:59 -

2 stops16h 36m

Deal found 18/8£623

Best flights from Birmingham to Chicago
Discover carefully curated flight deals from Birmingham to Chicago that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Fri 4/1209:25 -

2 stops17h 00m

Fri 11/1210:35 -

2 stops17h 10m

Deal found 16/8£603

Tue 13/1019:15 -

1 stop26h 55m

Tue 20/1007:25 -

2 stops29h 10m

Deal found 19/8£607

Sat 19/905:55 -

1 stop14h 20m

Tue 29/918:00 -

2 stops13h 40m

Deal found 17/8£615

Thu 1/1009:20 -

2 stops14h 59m

Mon 5/1013:19 -

2 stops13h 16m

Deal found 20/8£624

Thu 24/909:20 -

1 stop10h 55m

Wed 7/1010:24 -

2 stops17h 06m

Deal found 19/8£615

Wed 16/913:25 -

2 stops15h 19m

Tue 29/913:19 -

2 stops13h 16m

Deal found 19/8£632

Wed 16/905:55 -

1 stop14h 35m

Tue 29/913:55 -

2 stops17h 45m

Deal found 19/8£615

Wed 7/1009:20 -

1 stop11h 10m

Sun 18/1015:05 -

2 stops16h 35m

Deal found 19/8£615

Sun 6/905:55 -

2 stops16h 02m

Mon 21/913:19 -

2 stops13h 16m

Deal found 18/8£684

Wed 16/909:20 -

1 stop11h 10m

Mon 21/910:30 -

2 stops17h 00m

Deal found 17/8£615

Wed 16/913:25 -

2 stops15h 19m

Mon 21/913:19 -

2 stops13h 16m

Deal found 17/8£702

Wed 30/905:55 -

1 stop14h 35m

Wed 7/1010:24 -

2 stops17h 06m

Deal found 16/8£615

Tue 13/1005:55 -

1 stop14h 20m

Tue 20/1018:00 -

2 stops17h 50m

Deal found 17/8£615

Fri 25/909:20 -

1 stop10h 55m

Sat 3/1016:35 -

2 stops15h 05m

Deal found 19/8£615

Wed 4/1106:00 -

2 stops16h 47m

Sat 14/1113:22 -

2 stops14h 23m

Deal found 17/8£619

Wed 30/905:55 -

2 stops18h 38m

Wed 7/1009:29 -

2 stops17h 06m

Deal found 16/8£622

Thu 24/905:55 -

2 stops18h 24m

Wed 30/913:19 -

2 stops13h 16m

Deal found 18/8£623

Fri 2/1005:55 -

2 stops18h 24m

Fri 9/1009:29 -

2 stops17h 06m

Deal found 18/8£688

Fri 9/1005:55 -

2 stops18h 05m

Mon 19/1009:29 -

2 stops17h 06m

Deal found 20/8£729

Find flight deals from Birmingham to Chicago

Round-trip from	£455
One-way from	£310
Popular in	August
Cheapest in	November
Average price	£881

30/9-7/10
4 total stops
58h 10m total
Birmingham to Chicago

Search Deals

7/11
3 total stops
50h 05m total
Birmingham to Chicago

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£70 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£14 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Fri 4/12

09:25-20:25

2 stops17h 00m

Chicago O'Hare Intl

Fri 11/12

10:35-09:45

2 stops17h 10m

£603

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Tue 13/10

19:15-16:10

1 stop26h 55m

Chicago O'Hare Intl

Tue 20/10

07:25-18:35

2 stops29h 10m

£607

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Sat 19/9

05:55-14:15

1 stop14h 20m

Chicago O'Hare Intl

Tue 29/9

18:00-13:40

2 stops13h 40m

£615

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Thu 24/9

09:20-14:15

1 stop10h 55m

Chicago O'Hare Intl

Wed 7/10

10:24-09:30

2 stops17h 06m

£615

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Wed 16/9

05:55-14:30

1 stop14h 35m

Chicago O'Hare Intl

Tue 29/9

13:55-13:40

2 stops17h 45m

£615

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Wed 7/10

09:20-14:30

1 stop11h 10m

Chicago O'Hare Intl

Sun 18/10

15:05-13:40

2 stops16h 35m

£615

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Wed 16/9

09:20-14:30

1 stop11h 10m

Chicago O'Hare Intl

Mon 21/9

10:30-09:30

2 stops17h 00m

£615

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Wed 30/9

05:55-14:30

1 stop14h 35m

Chicago O'Hare Intl

Wed 7/10

10:24-09:30

2 stops17h 06m

£615

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Tue 13/10

05:55-14:15

1 stop14h 20m

Chicago O'Hare Intl

Tue 20/10

18:00-17:50

2 stops17h 50m

£615

Fastest return journey

BirminghamChicago

BHX Birmingham - ORD Chicago O'Hare Intl

BHXORD

Birmingham

Fri 25/9

09:20-14:15

1 stop10h 55m

Chicago O'Hare Intl

Sat 3/10

16:35-13:40

2 stops15h 05m

£615

Flights are sorted by cheapest return flights first.

Deals found on 18/8

Showing 1-10 of 33 resultsSorted by cheapest first

Best time to book a flight from Birmingham to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Birmingham with our price prediction graph.

BHX-CHI

BHX-ORD

BHX-MDW

Estimated return 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 Birmingham to Chicago

BHX-CHI

BHX-ORD

BHX-MDW

What is the cheapest month to book a flight from Birmingham to Chicago?

Currently, November is the cheapest month in which you can book a flight from Birmingham to Chicago (average of £564). Flying from Birmingham to Chicago in August is currently the most expensive (average of £868). 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 for a return flight from Birmingham to Chicago?

Airfare is below average for this route at the moment.

Birmingham to Chicago flights typically cost between £578 and £827 in October.
The cheapest return price found within the last 5 days was £363 on Multiple Airlines (5 Oct–12 Oct).

What’s the top stopover airport for flights from Birmingham to Chicago?

Dublin (DUB) – chosen by Cheapflights users on 69% of one-stop itineraries from Birmingham to Chicago on Cheapflights.

What’s the cheapest stopover airport for flights from Birmingham to Chicago?

Copenhagen (CPH) is the most affordable one-stop option, with an average return flight price of £369.

What’s the fastest stopover option from Birmingham to Chicago?

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 11h 15m.

Which airport typically offers the quickest stopover for flights from Birmingham to Chicago?

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 33m.

How far ahead should I book a flight from Birmingham to Chicago?

To ensure you get the cheapest price possible for a flight from Birmingham to Chicago, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Chicago

Check out reviews from past customers who have flown with KLM,Virgin Atlantic, andAer Lingus from Birmingham to Chicago to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.8

Good

1,560 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

KLM

7.8

Good

1,560 reviews

KLM

7.8

Good

1,560 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

Virgin Atlantic

7.4

Good

695 reviews

KLM

7.8

Good

1,560 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

Aer Lingus

7.3

Good

1,711 reviews

KLM

7.8

Good

1,560 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

British Airways

6.7

Okay

8,181 reviews

KLM

7.8

Good

1,560 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

Related info for your journey

What airport do you fly from for flights from Birmingham to Chicago?
Birmingham (BHX), located 6.8 mi from the city center, is the airport you fly out of when you book flights from Birmingham to Chicago. 5 airlines have flights from Birmingham to Chicago on a regular basis. Booking flights from Birmingham to Chicago should not be difficult; the airport handles an average of 0 outbound flights to Chicago per day.
How long is the flight from Birmingham to Chicago?
Delta, Scandinavian Airlines, and KLM can get you from Birmingham to Chicago in just under 14h 59m. Your travel time can differ by up to 11h 56m. Birmingham and Chicago are separated by a distance of 3863 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from Birmingham to Chicago round-trip?
Cheapflights users have booked flights from Birmingham to Chicago round-trip from £374. Other airlines that can offer you cheap pricing are Virgin Atlantic, from £464, and British Airways, from £490. Scandinavian Airlines is currently priced 44% below the average price you’ll pay for this route.
Can I find deals for flights from Birmingham to Chicago that include hotel bookings?
Yes. In addition to deals on Birmingham to Chicago flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Birmingham to Chicago?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Birmingham to Chicago.
Can I find deals for business class flights from Birmingham to Chicago?
Yes. Cheapflights offers flight deals from Birmingham to Chicago 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 Birmingham to Chicago?
Currently, November is the cheapest month in which you can book a flight from Birmingham to Chicago (average of £564). Flying from Birmingham to Chicago in August is currently the most expensive (average of £868). 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

Browse thousands of different options on Cheapflights for your next trip

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Doncaster to O'Hare Intl flights

Top 5 airlines flying from Birmingham to Chicago

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest£374	Average£423	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Virgin Atlantic	Cheapest£464	Average£648	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£490	Average£641	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
KLM	Cheapest£499	Average£650	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Aer Lingus	Cheapest£521	Average£706	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Fly with Cheapflights

How does Cheapflights help users find flights from Birmingham to Chicago?

Deals for Birmingham to Chicago flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Birmingham to Chicago?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Chicago from Birmingham.

Can Cheapflights find flights from Birmingham to Chicago with no change fees?

Yes, we can. To see specific flights from Birmingham to Chicago with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Birmingham to Chicago become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Chicago from Birmingham today and book when prices fit your budget.

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Cheap flights from Birmingham to Chicago from £310

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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Birmingham to Chicago

Cheapest flights from Birmingham to ChicagoExplore the most affordable flight options available from Birmingham to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Explore the most affordable flight options available from Birmingham to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Best flights from Birmingham to ChicagoDiscover carefully curated flight deals from Birmingham to Chicago that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Discover carefully curated flight deals from Birmingham to Chicago that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Last-minute flights from Birmingham to ChicagoDiscover last-minute flight deals from Birmingham to Chicago. Data last updated 21 August 2026 and is based on user searches.

Discover last-minute flight deals from Birmingham to Chicago. Data last updated 21 August 2026 and is based on user searches.

One-way flights from Birmingham to ChicagoSearch for one-way flight options from Birmingham to Chicago. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

Search for one-way flight options from Birmingham to Chicago. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

Find flight deals from Birmingham to Chicago

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Birmingham to Chicago that are best for you.

Best time to book a flight from Birmingham to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago from Birmingham with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from Birmingham to Chicago?

How much does it cost for a return flight from Birmingham to Chicago?

Airfare is below average for this route at the moment.

Birmingham to Chicago flights typically cost between £578 and £827 in October.The cheapest return price found within the last 5 days was £363 on Multiple Airlines (5 Oct–12 Oct).

What’s the top stopover airport for flights from Birmingham to Chicago?

Share of one-stop return flights from Birmingham to Chicago chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Dublin (DUB) – chosen by Cheapflights users on 69% of one-stop itineraries from Birmingham to Chicago on Cheapflights.

What’s the cheapest stopover airport for flights from Birmingham to Chicago?

Average return fare for one-stop flights from Birmingham to Chicago, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Copenhagen (CPH) is the most affordable one-stop option, with an average return flight price of £369.

What’s the fastest stopover option from Birmingham to Chicago?

Shortest average travel time for one-stop one-way flights from Birmingham to Chicago, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 11h 15m.

Which airport typically offers the quickest stopover for flights from Birmingham to Chicago?

Average stopover duration for one-stop one-way flights from Birmingham to Chicago, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 33m.

How far ahead should I book a flight from Birmingham to Chicago?

To ensure you get the cheapest price possible for a flight from Birmingham to Chicago, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Reviews of airlines servicing Chicago

Check out reviews from past customers who have flown with KLM,Virgin Atlantic, andAer Lingus from Birmingham to Chicago to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

What airport do you fly from for flights from Birmingham to Chicago?

How long is the flight from Birmingham to Chicago?

What are the cheapest airlines flying from Birmingham to Chicago round-trip?

Can I find deals for flights from Birmingham to Chicago that include hotel bookings?

How can I find direct flights from Birmingham to Chicago?

Can I find deals for business class flights from Birmingham to Chicago?

What is the cheapest month to book a flight from Birmingham to Chicago?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Birmingham to Chicago

See prices for flight routes from nearby airports that may be better suited for you.

Other flights to Chicago

Explore flights to Chicago departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 21 August 2026.

Complete your trip

Complete your trip to Chicago by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Illinois

Book a non-stop flight to one of these other cities located in Illinois.

Search flights from Birmingham to Chicago by cabin class

Find flights from Birmingham to Chicago, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Birmingham and Chicago flights

Browse other Birmingham and Chicago flight options. Last updated on 21 August 2026.

Other flights from Birmingham

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Top 5 airlines flying from Birmingham to Chicago

Fly with Cheapflights

How does Cheapflights help users find flights from Birmingham to Chicago?

Why should you use Cheapflights to find cheap flight tickets from Birmingham to Chicago?

Can Cheapflights find flights from Birmingham to Chicago with no change fees?

Can Cheapflights notify me if prices for flights from Birmingham to Chicago become cheaper?

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Travel Smart

Cheapest flights from Birmingham to Chicago
Explore the most affordable flight options available from Birmingham to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 August 2026.

Best flights from Birmingham to Chicago
Discover carefully curated flight deals from Birmingham to Chicago that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 August 2026.

Last-minute flights from Birmingham to Chicago
Discover last-minute flight deals from Birmingham to Chicago. Data last updated 21 August 2026 and is based on user searches.

One-way flights from Birmingham to Chicago
Search for one-way flight options from Birmingham to Chicago. Find affordable one-way fares based on user searches. Data last updated 21 August 2026.

Birmingham to Chicago flights typically cost between £578 and £827 in October.
The cheapest return price found within the last 5 days was £363 on Multiple Airlines (5 Oct–12 Oct).