What day of the week experiences the fewest flight delays on this route?

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Lisbon?

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 9h 55m.

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Lisbon?

Toronto (YYZ) was the most common stop: 28% of momondo users choosing 1-stop flights on this route connected there.

What is the cheapest airline that flies from Chicago O'Hare Intl to Lisbon Humberto Delgado?

Scandinavian Airlines and Icelandair are the most popular carriers operating from Chicago O'Hare Intl to Lisbon Humberto Delgado

How often are flights from Chicago to Lisbon delayed?

Historically, on average around 41% of flights between Chicago and Lisbon have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

What airlines fly to Lisbon?

TAP AIR PORTUGAL, United Airlines and British Airways are the top three most popular airlines that fly to Lisbon from Chicago O'Hare Intl Airport according to our data. TAP AIR PORTUGAL is the first choice among our users, with 61% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 17 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

How many flights depart from Chicago O'Hare Intl Airport to Lisbon on average per week?

As of November 2025, 2 flights take off from Chicago O'Hare Intl Airport and land in Lisbon each week. The most common flight departure day for this route is Wed, with 100% of weekly flights taking off on this day.

What is the most punctual flight time for Chicago to Lisbon flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Which airline has the best punctuality record on Chicago to Lisbon flights?

According to our data, TAP AIR PORTUGAL have had the least number of delays on this route over the last 12 months; with about 41% of their flights experiencing any sort of delay.

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Lisbon?

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $391.

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Lisbon?

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 29m.

When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?

Prices for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport refresh daily.

How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?

The number of operators available for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport is 17 as of November 2025.

How old do you have to be to fly from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport.

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

The travel and health documents you'll need for your trip to Lisbon Humberto Delgado Airport 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 Lisbon Humberto Delgado Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$217 Cheap Flights from Chicago O'Hare Intl Airport to Lisbon in 2025/26

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Find the cheapest flights from Chicago O'Hare Intl Airport to Lisbon

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

12:09 pm - 10:15 amORD-LIS

16h 06m2 stops

5:00 am - 3:20 pmLIS-ORD

16h 20m1 stop

$486United Airlines

Find Deal

Tue, Dec 30 - Wed, Jan 21

8:15 pm - 8:55 amORD-LIS

30h 40m1 stop

3:25 pm - 4:20 pmLIS-ORD

30h 55m1 stop

$487Multiple Airlines

Find Deal

Tue, Dec 30 - Mon, Jan 19

12:09 pm - 10:15 amORD-LIS

16h 06m2 stops

6:10 am - 2:10 pmLIS-ORD

14h 00m1 stop

$488United Airlines

Find Deal

Tue, Dec 30 - Tue, Jan 20

10:45 am - 11:20 amORD-LIS

18h 35m2 stops

11:25 am - 2:20 pmLIS-ORD

32h 55m1 stop

$489Delta

Find Deal

Sun, Feb 1 - Thu, Feb 12

2:35 pm - 3:10 pmORD-LIS

18h 35m2 stops

11:25 am - 2:20 pmLIS-ORD

32h 55m1 stop

$490Delta

Find Deal

Wed, Nov 26 - Tue, Dec 2

2:00 pm - 9:20 amORD-LIS

13h 20m1 stop

6:10 am - 5:48 pmLIS-ORD

17h 38m2 stops

$493Air Canada

Find Deal

Wed, Jan 28 - Fri, Jan 30

1:57 pm - 9:05 amORD-LIS

13h 08m2 stops

8:20 am - 2:55 pmLIS-ORD

12h 35m1 stop

$498American Airlines

Find Deal

Thu, Jan 22 - Tue, Jan 27

12:50 pm - 11:35 amORD-LIS

16h 45m2 stops

6:10 am - 5:48 pmLIS-ORD

17h 38m2 stops

$504Air Canada

Find Deal

Wed, Nov 26 - Wed, Dec 3

9:45 pm - 10:05 amORD-LIS

30h 20m1 stop

6:35 pm - 1:50 pmLIS-ORD

25h 15m1 stop

$508British Airways

Find Deal

Thu, Nov 13 - Wed, Nov 19

5:10 pm - 2:50 pmORD-LIS

15h 40m1 stop

8:55 am - 8:34 pmLIS-ORD

17h 39m1 stop

$516British Airways

Find Deal

Fri, Nov 28 - Thu, Dec 11

Air Canada flights from Chicago O'Hare Intl Airport to Lisbon

Our best Air Canada deals on Chicago O'Hare Intl Airport to Lisbon flight tickets

Air Canada

Jan 28

ORD2:00 pmChicago O'Hare Intl

13h 20m

1 stop

LIS9:20 amLisbon Humberto Delgado

Jan 30

LIS6:10 amLisbon Humberto Delgado

17h 38m

2 stops

ORD5:48 pmChicago O'Hare Intl

$493

Find similar

Air Canada

Nov 26

ORD12:50 pmChicago O'Hare Intl

16h 45m

2 stops

LIS11:35 amLisbon Humberto Delgado

Dec 3

LIS6:10 amLisbon Humberto Delgado

17h 38m

2 stops

ORD5:48 pmChicago O'Hare Intl

$504

Find similar

Air Canada

Dec 29

ORD9:20 pmChicago O'Hare Intl

30h 00m

2 stops

LIS9:20 amLisbon Humberto Delgado

Jan 20

LIS11:20 amLisbon Humberto Delgado

13h 31m

1 stop

ORD6:51 pmChicago O'Hare Intl

$514

Find similar

American Airlines flights from Chicago O'Hare Intl Airport to Lisbon

Our best American Airlines deals on Chicago O'Hare Intl Airport to Lisbon flight tickets

American Airlines

Jan 22

ORD1:57 pmChicago O'Hare Intl

13h 08m

2 stops

LIS9:05 amLisbon Humberto Delgado

Jan 27

LIS8:20 amLisbon Humberto Delgado

12h 35m

1 stop

ORD2:55 pmChicago O'Hare Intl

$498

Find similar

American Airlines

Nov 15

ORD3:20 pmChicago O'Hare Intl

11h 45m

2 stops

LIS9:05 amLisbon Humberto Delgado

Nov 24

LIS6:30 amLisbon Humberto Delgado

14h 25m

1 stop

ORD2:55 pmChicago O'Hare Intl

$598

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 12/30

12:09 pm-10:15 am

2 stops16h 06m

Lisbon Humberto Delgado

Wed 1/21

5:00 am-3:20 pm

1 stop16h 20m

$486

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 12/30

8:15 pm-8:55 am

1 stop30h 40m

Lisbon Humberto Delgado

Mon 1/19

3:25 pm-4:20 pm

1 stop30h 55m

$487

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Tue 12/30

12:09 pm-10:15 am

2 stops16h 06m

Lisbon Humberto Delgado

Tue 1/20

6:10 am-2:10 pm

1 stop14h 00m

$488

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 2/1

10:45 am-11:20 am

2 stops18h 35m

Lisbon Humberto Delgado

Thu 2/12

11:25 am-2:20 pm

1 stop32h 55m

$489

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 11/26

2:35 pm-3:10 pm

2 stops18h 35m

Lisbon Humberto Delgado

Tue 12/2

11:25 am-2:20 pm

1 stop32h 55m

$490

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 1/28

2:00 pm-9:20 am

1 stop13h 20m

Lisbon Humberto Delgado

Fri 1/30

6:10 am-5:48 pm

2 stops17h 38m

$493

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Thu 1/22

1:57 pm-9:05 am

2 stops13h 08m

Lisbon Humberto Delgado

Tue 1/27

8:20 am-2:55 pm

1 stop12h 35m

$498

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 11/26

12:50 pm-11:35 am

2 stops16h 45m

Lisbon Humberto Delgado

Wed 12/3

6:10 am-5:48 pm

2 stops17h 38m

$504

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Thu 11/13

9:45 pm-10:05 am

1 stop30h 20m

Lisbon Humberto Delgado

Wed 11/19

6:35 pm-1:50 pm

1 stop25h 15m

$508

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Fri 11/28

5:10 pm-2:50 pm

1 stop15h 40m

Lisbon Humberto Delgado

Thu 12/11

8:55 am-8:34 pm

1 stop17h 39m

$516

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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Lisbon

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

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Delays

Layovers

Other information

What is the cheapest month to fly to Lisbon?

In general, January is the cheapest month to fly from Chicago O'Hare Intl Airport to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $561. If you are unable to visit Lisbon during the month of January, then departing from Chicago O'Hare Intl Airport during the month February is also very affordable. Most momondo users find prices during this month for around $567.

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

Our data shows that Wednesday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $592. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Chicago O'Hare Intl Airport to Lisbon for around $809.

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

The cheapest time of day to fly to Lisbon is in the evening when flights can be purchased for as low as $568. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $801 on average. Flights to Lisbon from Chicago O'Hare Intl Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Chicago O'Hare Intl to Lisbon Humberto Delgado flight route?

Fly from Chicago O'Hare Intl to Lisbon Humberto Delgado for the best Chicago O'Hare Intl - Lisbon Humberto Delgado flight prices

How far in advance should I book a flight to Lisbon?

You are more likely to see cheaper flights to Lisbon from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Lisbon for around $763 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Lisbon from Chicago O'Hare Intl Airport for as low as $698 on momondo.

What cabin class options are available on Chicago O'Hare Intl to Lisbon Humberto Delgado flights?

There are 3 cabin classes available to choose from on Chicago O'Hare Intl to Lisbon Humberto Delgado 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 Chicago O'Hare Intl Airport to Lisbon flights?

You could potentially save up to 46% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Lisbon flight.

How have Chicago O'Hare Intl Airport to Lisbon flight prices changed over time?

As of November 2025, prices for Chicago O'Hare Intl Airport to Lisbon flights are approximately 32% more expensive when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to Lisbon

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Lisbon according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to Lisbon (ORD to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Lisbon

Best Price Found	$321
Fastest flight time	7h 55m
Direct flights	Mon, Thu, Sat and Sun
Airports in Lisbon	1 airport

The best one-way flight to Lisbon from Chicago O'Hare Intl Airport in the past 72 hours is $321. The best round-trip flight deal from Chicago O'Hare Intl Airport to Lisbon found on momondo in the last 72 hours is $408.

The fastest flight from Chicago O'Hare Intl Airport to Lisbon takes 7h 55m

Direct flights go from Chicago O'Hare Intl Airport to Lisbon on Monday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.

There is 1 airport near Lisbon: Lisbon Humberto Delgado (LIS)

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How far is Chicago O'Hare Intl to Lisbon Humberto Delgado by plane?
Lisbon Humberto Delgado is 3998.0 mi away from Chicago O'Hare Intl. A reasonable flight in good conditions will take 9h 54m.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?
Prices for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport refresh daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?
The number of operators available for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport is 17 as of November 2025.
How old do you have to be to fly from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport.
What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?
The travel and health documents you'll need for your trip to Lisbon Humberto Delgado Airport 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 Lisbon Humberto Delgado Airport. 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 Chicago O'Hare Intl Airport to Lisbon?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and Lisbon, the leading plane model is Boeing 787 Dreamliner, making up 19.67% of the total bookings. Other popular models include Airbus A330-300 with 17.99%, Airbus A330-900neo with 16.37%, and Boeing 787-8 Dreamliner with 15.38%.
What is the most popular airline from Chicago O'Hare Intl Airport to Lisbon?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and Lisbon, the leading airline is TAP AIR PORTUGAL, making up 50% of the total bookings. Other popular airlines include United Airlines with 18%, British Airways with 8%, and Air Canada with 6%.

Best airlines flying from Chicago O'Hare Intl Airport to Lisbon

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Lisbon with momondo

Airline	Rating	Free Cancellation	Price
Scandinavian Airlines	PriceFrom $369	Free Cancellation	Rating 7.4 1,564 reviews	Search Scandinavian Airlines flights
Icelandair	PriceFrom $425	Free Cancellation	Rating 7.1 572 reviews	Search Icelandair flights
Lufthansa	PriceFrom $441	Free Cancellation	Rating 6.8 7,558 reviews	Search Lufthansa flights
Air France	PriceFrom $470	Free Cancellation	Rating 7.4 1,484 reviews	Search Air France flights
TAP AIR PORTUGAL	PriceFrom $484	Free Cancellation	Rating 7.1 2,048 reviews	Search TAP AIR PORTUGAL flights
SWISS	PriceFrom $496	Free Cancellation	Rating 7.5 1,779 reviews	Search SWISS flights
Aer Lingus	PriceFrom $497	Free Cancellation	Rating 7.2 1,365 reviews	Search Aer Lingus flights
American Airlines	PriceFrom $510	Free Cancellation	Rating 7.2 11,040 reviews	Search American Airlines flights
United Airlines	PriceFrom $537	Free Cancellation	Rating 7.4 9,007 reviews	Search United Airlines flights
KLM	PriceFrom $538	Free Cancellation	Rating 7.7 1,405 reviews	Search KLM flights

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Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Lisbon?

Finding the right flight to Lisbon from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Lisbon quick and easy, saving you time and money.

Can I find flights from Chicago to Lisbon with flexible booking policies on momondo?

All flight searches from Chicago to Lisbon on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Chicago to Lisbon?

Once you have performed a search for Chicago to Lisbon flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Chicago to Lisbon 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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Cheap flights from Chicago O'Hare Intl Airport to Lisbon from $217

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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Lisbon

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 Lisbon?

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

Our data shows that Wednesday is the least expensive day to fly to Lisbon. Tickets to fly out on this day can be as low as $592. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Chicago O'Hare Intl Airport to Lisbon for around $809.

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

What is the cheapest Chicago O'Hare Intl to Lisbon Humberto Delgado flight route?

Fly from Chicago O'Hare Intl to Lisbon Humberto Delgado for the best Chicago O'Hare Intl - Lisbon Humberto Delgado flight prices

How far in advance should I book a flight to Lisbon?

What cabin class options are available on Chicago O'Hare Intl to Lisbon Humberto Delgado flights?

There are 3 cabin classes available to choose from on Chicago O'Hare Intl to Lisbon Humberto Delgado 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 Chicago O'Hare Intl Airport to Lisbon flights?

You could potentially save up to 46% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Lisbon flight.

How have Chicago O'Hare Intl Airport to Lisbon flight prices changed over time?

As of November 2025, prices for Chicago O'Hare Intl Airport to Lisbon flights are approximately 32% more expensive when compared to flights at the same time last year.

What is the cheapest airline that flies from Chicago O'Hare Intl to Lisbon Humberto Delgado?

Scandinavian Airlines and Icelandair are the most popular carriers operating from Chicago O'Hare Intl to Lisbon Humberto Delgado

What airlines fly to Lisbon?

How often are flights from Chicago to Lisbon delayed?

Historically, on average around 41% of flights between Chicago and Lisbon have experienced a delay on any given week. The average delay length over the past 12 months has been 138 minutes.

What is the most punctual flight time for Chicago to Lisbon flights?

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Thursday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on Chicago to Lisbon flights?

According to our data, TAP AIR PORTUGAL have had the least number of delays on this route over the last 12 months; with about 41% of their flights experiencing any sort of delay.

Which airport is the most popular layover for flights between Chicago O'Hare Intl Airport and Lisbon?

Toronto (YYZ) was the most common stop: 28% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Chicago O'Hare Intl Airport to Lisbon?

Flights via Copenhagen (CPH) offer the lowest average round-trip price of $391.

Which layover airport has the shortest travel time from Chicago O'Hare Intl Airport to Lisbon?

Flights connecting via Montreal (YUL) have the shortest average one-way travel time: 9h 55m.

Which layover airport has the shortest connection time from Chicago O'Hare Intl Airport to Lisbon?

Washington, D.C. (IAD) has the shortest average layover time for this route: 1h 29m.

How many flights depart from Chicago O'Hare Intl Airport to Lisbon on average per week?

As of November 2025, 2 flights take off from Chicago O'Hare Intl Airport and land in Lisbon each week. The most common flight departure day for this route is Wed, with 100% of weekly flights taking off on this day.

When to book flights from Chicago O'Hare Intl Airport to Lisbon

Cheap Chicago O'Hare Intl Airport to Lisbon (ORD to LIS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Lisbon

Best Price Found

Fastest flight time

Direct flights

Airports in Lisbon

How far is Chicago O'Hare Intl to Lisbon Humberto Delgado by plane?

When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?

How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?

How old do you have to be to fly from Chicago O'Hare Intl Airport to Lisbon Humberto Delgado Airport?

What documentation or ID do you need to fly to Lisbon Humberto Delgado Airport?

What is the most popular plane model from Chicago O'Hare Intl Airport to Lisbon?

What is the most popular airline from Chicago O'Hare Intl Airport to Lisbon?

Best airlines flying from Chicago O'Hare Intl Airport to Lisbon

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Lisbon with momondo

Traveling to a place near Lisbon?

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Lisbon?

Can I find flights from Chicago to Lisbon with flexible booking policies on momondo?

How can momondo help me find flights from Chicago to Lisbon?

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

An easier way to manage your Lisbon trip