Which layover airport has the shortest travel time from Chicago to Porto?

Flights connecting via Lisbon (LIS) have the shortest average one-way travel time: 12h 03m.

Which airport is the most popular layover for flights between Chicago and Porto?

Lisbon (LIS) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Chicago to Porto?

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 41m.

What is the cheapest airline that flies from Chicago to Porto?

United Airlines and Delta are the most popular carriers operating from Chicago to Porto

What airlines fly to Porto?

TAP AIR PORTUGAL, United Airlines and Lufthansa are the top three most popular airlines that fly to Porto from Chicago according to our data. TAP AIR PORTUGAL is the first choice among our users, with 54% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 7 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

Which layover airport offers the lowest fares from Chicago to Porto?

Flights via Lisbon (LIS) offer the lowest average round-trip price of $790.

When did momondo last update prices for flights from Chicago to Porto Airport?

Prices for flights from Chicago to Porto Airport refresh daily.

How many operators does momondo search for flights from Chicago to Porto Airport?

As of September 2026, there are 7 operators available to choose from for flights from Chicago to Porto Airport.

How old do you have to be to fly from Chicago to Porto Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Porto Airport.

What documentation or ID do you need to fly to Porto Airport?

The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$232 Cheap Flights from Chicago to Porto in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Chicago to Porto

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:40 pm - 5:50 pmORD Chicago O'Hare Intl-OPO Porto

15h 10m1 stop London Heathrow

8:40 pm - 4:10 pmOPO Porto-ORD Chicago O'Hare Intl

24h 30m1 stop Madrid Barajas

$574Multiple Airlines

Tue, Mar 2 - Tue, Mar 23

4:55 pm - 11:45 amORD Chicago O'Hare Intl-OPO Porto

12h 50m1 stop Madrid Barajas

8:20 am - 2:55 pmOPO Porto-ORD Chicago O'Hare Intl

12h 35m1 stop Madrid Barajas

$577Multiple Airlines

Sun, Oct 18 - Tue, Nov 3

10:34 am - 7:40 amORD Chicago O'Hare Intl-OPO Porto

15h 06m2 stops New York John F Kennedy Intl Madrid Barajas

8:40 pm - 4:10 pmOPO Porto-ORD Chicago O'Hare Intl

24h 30m1 stop Madrid Barajas

$578Iberia

Tue, Mar 2 - Tue, Mar 23

5:40 pm - 11:45 amORD Chicago O'Hare Intl-OPO Porto

12h 05m1 stop Madrid Barajas

8:20 am - 2:55 pmOPO Porto-ORD Chicago O'Hare Intl

12h 35m1 stop Madrid Barajas

$607Iberia

Fri, Nov 13 - Wed, Nov 18

6:05 pm - 11:15 pmORD Chicago O'Hare Intl-OPO Porto

23h 10m1 stop Lisbon Humberto Delgado

8:30 am - 4:30 pmOPO Porto-ORD Chicago O'Hare Intl

13h 00m1 stop Lisbon Humberto Delgado

$618TAP AIR PORTUGAL

Sat, Oct 17 - Fri, Oct 30

6:00 pm - 8:25 pmORD Chicago O'Hare Intl-OPO Porto

20h 25m1 stop Lisbon Humberto Delgado

6:00 pm - 4:30 pmOPO Porto-ORD Chicago O'Hare Intl

27h 30m1 stop Lisbon Humberto Delgado

$625TAP AIR PORTUGAL

Thu, Oct 22 - Thu, Oct 29

10:34 am - 7:40 amORD Chicago O'Hare Intl-OPO Porto

15h 06m2 stops New York John F Kennedy Intl Madrid Barajas

8:20 am - 9:00 pmOPO Porto-ORD Chicago O'Hare Intl

18h 40m2 stops Madrid Barajas New York John F Kennedy Intl

$645American Airlines

Sun, Feb 14 - Mon, Feb 22

4:40 pm - 9:30 amORD Chicago O'Hare Intl-OPO Porto

10h 50m1 stop Newark

6:00 am - 3:20 pmOPO Porto-ORD Chicago O'Hare Intl

15h 20m1 stop Frankfurt am Main

$662United Airlines

Mon, Nov 23 - Tue, Dec 1

7:00 am - 9:30 amORD Chicago O'Hare Intl-OPO Porto

20h 30m1 stop Newark

6:00 am - 3:20 pmOPO Porto-ORD Chicago O'Hare Intl

15h 20m1 stop Frankfurt am Main

$662United Airlines

Tue, Nov 24 - Tue, Dec 1

5:40 pm - 11:45 amORD Chicago O'Hare Intl-OPO Porto

12h 05m1 stop Madrid Barajas

8:40 pm - 3:10 pmOPO Porto-ORD Chicago O'Hare Intl

24h 30m1 stop Madrid Barajas

$676American Airlines

Tue, Nov 24 - Mon, Nov 30

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 pm - 7:00 pmORD Chicago O'Hare Intl-OPO Porto

19h 00m1 stop Lisbon Humberto Delgado

9:15 pm - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

21h 25m1 stop Lisbon Humberto Delgado

$805TAP AIR PORTUGAL

Fri, Sep 11 - Wed, Sep 16

6:05 pm - 8:25 pmORD Chicago O'Hare Intl-OPO Porto

20h 20m1 stop Lisbon Humberto Delgado

10:30 pm - 4:00 pmOPO Porto-ORD Chicago O'Hare Intl

23h 30m1 stop Lisbon Humberto Delgado

$814TAP AIR PORTUGAL

Sat, Sep 12 - Thu, Oct 22

6:00 pm - 11:00 pmORD Chicago O'Hare Intl-OPO Porto

23h 00m2 stops Lisbon Humberto Delgado Madrid Barajas

7:10 am - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

35h 30m2 stops Madrid Barajas Lisbon Humberto Delgado

$902Multiple Airlines

Fri, Sep 11 - Wed, Sep 16

9:38 am - 8:25 pmORD Chicago O'Hare Intl-OPO Porto

28h 47m2 stops Boston Logan Intl Lisbon Humberto Delgado

9:15 pm - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

21h 25m1 stop Lisbon Humberto Delgado

$982TAP AIR PORTUGAL

Fri, Sep 11 - Wed, Sep 16

10:59 am - 5:00 pmORD Chicago O'Hare Intl-OPO Porto

24h 01m2 stops New York John F Kennedy Intl Lisbon Humberto Delgado

7:00 am - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

11h 40m1 stop Lisbon Humberto Delgado

$997TAP AIR PORTUGAL

Sat, Sep 12 - Thu, Oct 22

7:25 am - 6:45 amORD Chicago O'Hare Intl-OPO Porto

17h 20m2 stops Toronto Island Montreal Pierre Elliott Trudeau Intl

8:40 pm - 4:00 pmOPO Porto-ORD Chicago O'Hare Intl

25h 20m2 stops Madrid Barajas Lisbon Humberto Delgado

$1,080Multiple Airlines

Sat, Sep 12 - Thu, Oct 22

9:00 pm - 10:45 pmORD Chicago O'Hare Intl-OPO Porto

19h 45m3 stops Dublin Lyon-Saint Exupéry Lisbon Humberto Delgado

4:50 pm - 12:40 pmOPO Porto-ORD Chicago O'Hare Intl

25h 50m2 stops Barcelona-El Prat Lisbon Humberto Delgado

$1,117Multiple Airlines

Fri, Sep 11 - Wed, Sep 16

10:15 am - 7:15 amORD Chicago O'Hare Intl-OPO Porto

39h 00m2 stops Addis Ababa Bole Madrid Barajas

7:55 pm - 8:15 amOPO Porto-ORD Chicago O'Hare Intl

42h 20m3 stops Madrid Barajas Addis Ababa Bole Rome Fiumicino

$1,156Ethiopian Air

Sat, Sep 12 - Thu, Oct 22

6:05 am - 3:25 pmMDW Chicago Midway-OPO Porto

27h 20m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 6:33 pmOPO Porto-MDW Chicago Midway

19h 33m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

$1,216Delta

Tue, Sep 15 - Wed, Sep 30

10:48 am - 3:25 pmMDW Chicago Midway-OPO Porto

22h 37m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 6:19 pmOPO Porto-MDW Chicago Midway

19h 19m2 stops Amsterdam Schiphol Minneapolis St Paul

$1,216Delta

Tue, Sep 15 - Tue, Sep 29

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

SWISS flights from Chicago to Porto

Our best SWISS deals on Chicago to Porto flight tickets

SWISS

Feb 14

ORD6:50 pmChicago O'Hare Intl

34h 25m

1 stop

OPO11:15 amPorto

Feb 22

OPO7:20 pmPorto

26h 55m

1 stop

ORD4:15 pmChicago O'Hare Intl

$621

SWISS

Sep 18

ORD2:20 pmChicago O'Hare Intl

22h 10m

1 stop

OPO6:30 pmPorto

Oct 4

OPO7:20 pmPorto

23h 15m

1 stop

ORD12:35 pmChicago O'Hare Intl

$973

SWISS

Sep 24

ORD2:20 pmChicago O'Hare Intl

22h 10m

1 stop

OPO6:30 pmPorto

Dec 21

OPO7:20 pmPorto

26h 55m

1 stop

ORD4:15 pmChicago O'Hare Intl

$1,070

Delta flights from Chicago to Porto

Our best Delta deals on Chicago to Porto flight tickets

Delta

Nov 11

MDW1:31 pmChicago Midway

15h 04m

2 stops

OPO10:35 amPorto

Nov 18

OPO5:00 amPorto

17h 39m

2 stops

MDW4:39 pmChicago Midway

$732

Delta

Feb 14

MDW1:00 pmChicago Midway

15h 35m

2 stops

OPO10:35 amPorto

Feb 24

OPO5:00 amPorto

19h 37m

2 stops

MDW6:37 pmChicago Midway

$737

Delta

Mar 2

MDW9:55 amChicago Midway

18h 40m

2 stops

OPO10:35 amPorto

Mar 23

OPO5:00 amPorto

18h 37m

2 stops

MDW6:37 pmChicago Midway

$759

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 3/2

8:40 pm-5:50 pm

1 stop15h 10m

Porto

Tue 3/23

8:40 pm-4:10 pm

1 stop24h 30m

$574

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 10/18

4:55 pm-11:45 am

1 stop12h 50m

Porto

Tue 11/3

8:20 am-2:55 pm

1 stop12h 35m

$577

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 3/2

10:34 am-7:40 am

2 stops15h 06m

Porto

Tue 3/23

8:40 pm-4:10 pm

1 stop24h 30m

$578

Quickest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Fri 11/13

5:40 pm-11:45 am

1 stop12h 05m

Porto

Wed 11/18

8:20 am-2:55 pm

1 stop12h 35m

$607

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sat 10/17

6:05 pm-11:15 pm

1 stop23h 10m

Porto

Fri 10/30

8:30 am-4:30 pm

1 stop13h 00m

$618

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Thu 10/22

6:00 pm-8:25 pm

1 stop20h 25m

Porto

Thu 10/29

6:00 pm-4:30 pm

1 stop27h 30m

$625

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 2/14

10:34 am-7:40 am

2 stops15h 06m

Porto

Mon 2/22

8:20 am-9:00 pm

2 stops18h 40m

$645

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Mon 11/23

4:40 pm-9:30 am

1 stop10h 50m

Porto

Tue 12/1

6:00 am-3:20 pm

1 stop15h 20m

$662

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 11/24

7:00 am-9:30 am

1 stop20h 30m

Porto

Tue 12/1

6:00 am-3:20 pm

1 stop15h 20m

$662

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 11/24

5:40 pm-11:45 am

1 stop12h 05m

Porto

Mon 11/30

8:40 pm-3:10 pm

1 stop24h 30m

$676

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 Chicago to Porto

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

Layovers

What is the typical price of a round-trip flight between Chicago and Porto?

Prices are currently low for flights on this route.

Typical prices usually range from $805 to $1,109.
The lowest price recently found on this route was $574.

What is the cheapest month to fly to Porto?

The month of January is, on average, the cheapest month to fly to Porto from Chicago, with most prices found around $564. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago during April instead. Flights to Porto in April, while not as cheap as those in January, still average around $610.

How far in advance should I book a flight from Chicago to Porto?

You are more likely to see cheaper flights to Porto from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $824 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Chicago for as low as $674 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 17% on your flight if you consider stops on a Chicago to Porto flight.

When to book flights from Chicago to Porto

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

Estimated round-trip price

Cheap Chicago to Porto (CHI to OPO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Porto

Best Price Found	$232
Fastest flight time	12h 30m
Direct flights	None

The best one-way flight to Porto from Chicago in the past 72 hours is $232. The best round-trip flight deal from Chicago to Porto found on momondo in the last 72 hours is $574.

The fastest flight from Chicago to Porto takes 12h 30m

There are no direct flights from Chicago to Porto. There are no popular flight routes from Chicago to Porto.

Search flight deals

Frequently asked questions about flying from Chicago to Porto

How far is Chicago to Porto by plane?
A flight from Chicago to Porto will travel around 3927.7 mi. By plane, this route typically takes 12h 30m.
When did momondo last update prices for flights from Chicago to Porto Airport?
Prices for flights from Chicago to Porto Airport refresh daily.
How many operators does momondo search for flights from Chicago to Porto Airport?
As of September 2026, there are 7 operators available to choose from for flights from Chicago to Porto Airport.
How old do you have to be to fly from Chicago to Porto Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Chicago to Porto?
Based on momondo bookings for flights between Chicago and Porto, the leading airline is TAP AIR PORTUGAL, making up 72% of the total bookings. Other popular airlines include United Airlines with 19% and Iberia with 9%.

Best airlines flying from Chicago to Porto

Compare and see reviews for airlines that fly from Chicago to Porto with momondo

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $451	Free Cancellation	Rating 7.2 2,387 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $474	Free Cancellation	Rating 6.8 8,213 reviews	Search Lufthansa flights
United Airlines	PriceFrom $489	Free Cancellation	Rating 7.4 10,194 reviews	Search United Airlines flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,252 reviews	Search Iberia flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 12,044 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,576 reviews	Search KLM flights
Turkish Airlines	PriceFrom $618	Free Cancellation	Rating 7.4 4,473 reviews	Search Turkish Airlines flights

Coimbra

Vila Nova de Gaia

Aveiro

Braga

Pinhao

Matosinhos

Esposende

Chaves

Arcos de Valdevez

Viseu

Espinho

Guimarães

Lamego

Ponte de Lima

Penafiel

Caminha

Baiao

Mira

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Chicago to Porto. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo allows you to filter the results for Chicago to Porto flights to just show those with flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to Porto from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Chicago to Porto 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.

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sat 10/10

Sat 10/17

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Nearby airports

Airlines

Cabin classes

Other Portugal destinations

Other flights from Chicago

Complete your trip

Feeling lucky

Airports servicing Portugal

Faro Airport

Lisbon Humberto Delgado Airport

Azores Airport

Madeira Airport

Algarve Airport

Cheap flights from Chicago to Porto from $232

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Porto departing on 10/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Chicago to Porto

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

SWISS flights from Chicago to Porto

Our best SWISS deals on Chicago to Porto flight tickets

Delta flights from Chicago to Porto

Our best Delta deals on Chicago to Porto flight tickets

momondo Fare Finder

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

See travel insights to Porto from

How to get the cheapest flight ticket from Chicago to Porto

What is the typical price of a round-trip flight between Chicago and Porto?

What is the cheapest month to fly to Porto?

How far in advance should I book a flight from Chicago to Porto?

Can stopping save me money on Chicago to Porto flights?

What is the cheapest airline that flies from Chicago to Porto?

What airlines fly to Porto?

Which airport is the most popular layover for flights between Chicago and Porto?

Which layover airport offers the lowest fares from Chicago to Porto?

Which layover airport has the shortest travel time from Chicago to Porto?

Which layover airport has the shortest connection time from Chicago to Porto?

When to book flights from Chicago to Porto

Cheap Chicago to Porto (CHI to OPO) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Chicago to Porto

Best airlines flying from Chicago to Porto

Compare and see reviews for airlines that fly from Chicago to Porto with momondo

Traveling to a place near Porto?

Why use momondo?

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Portugal

Airports servicing Portugal

Fly your favorite airline to Porto

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Porto

List of cabin classes available on flights landing in Porto. Availability may vary depending on flight origin and airline.

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Chicago

According to popular flight searches on momondo this year

Complete your trip to Porto

Explore popular destinations other users love

According to popular flight searches on momondo this year