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

Flights via Madrid (MAD) offer the lowest average round-trip price of $724.

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.

How often are flights from Chicago to Porto delayed?

Historically, on average around 100% of flights between Chicago and Porto have experienced a delay on any given week. The average delay length over the past 12 months has been 319 minutes.

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

Generally, flights departing at night tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

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

Lisbon (LIS) was the most common stop: 48% of momondo users choosing 1-stop flights on this route connected there.

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

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

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 44% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 6 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

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

Flights connecting via Madrid (MAD) have the shortest average one-way travel time: 12h 00m.

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

Air Canada and Delta are the most popular carriers operating from Chicago to Porto

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 June 2026, there are 6 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.

$365 Cheap Flights from Chicago to Porto in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

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

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.

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$607Scandinavian Airlines

Mon, Nov 2 - Wed, Nov 11

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$608Scandinavian Airlines

Mon, Nov 2 - Wed, Nov 11

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

12:00 pm - 4:45 pm

OPO

ORD

34h 45m

1 stop

$638Scandinavian Airlines

Mon, Nov 2 - Sat, Nov 7

7:15 pm - 11:10 am

ORD

OPO

33h 55m

1 stop

11:55 am - 4:45 pm

OPO

ORD

34h 50m

1 stop

$646Scandinavian Airlines

Thu, Nov 5 - Wed, Nov 11

7:15 pm - 11:05 am

ORD

OPO

33h 50m

1 stop

5:50 pm - 4:45 pm

OPO

ORD

28h 55m

1 stop

$668Scandinavian Airlines

Mon, Nov 23 - Thu, Nov 26

6:00 pm - 3:15 pm

ORD

OPO

15h 15m

1 stop

8:30 am - 3:30 pm

OPO

ORD

13h 00m

1 stop

$740TAP AIR PORTUGAL

Sun, Aug 30 - Wed, Dec 9

9:24 am - 10:40 am

MDW

OPO

19h 16m

2 stops

5:00 am - 9:45 pm

OPO

MDW

22h 45m

2 stops

$883Delta

Sun, Aug 30 - Wed, Dec 9

10:25 am - 10:00 pm

MDW

OPO

29h 35m

2 stops

1:30 pm - 9:40 am

OPO

MDW

26h 10m

1 stop

$918Multiple Airlines

Sun, Jul 26 - Tue, Aug 11

10:25 am - 10:00 pm

MDW

OPO

29h 35m

2 stops

1:30 pm - 9:40 am

OPO

MDW

26h 10m

1 stop

$923Multiple Airlines

Sun, Jul 26 - Tue, Aug 11

1:27 pm - 3:30 pm

MDW

OPO

20h 03m

2 stops

5:00 am - 9:46 pm

OPO

MDW

22h 46m

2 stops

$945Delta

Sun, Aug 30 - Fri, Sep 11

Lufthansa flights from Chicago to Porto

Our best Lufthansa deals on Chicago to Porto flight tickets

Lufthansa

Nov 3

ORD4:20 pmChicago O'Hare Intl

17h 00m

1 stop

OPO3:20 pmPorto

Nov 8

OPO6:00 amPorto

13h 10m

1 stop

ORD1:10 pmChicago O'Hare Intl

$745

Lufthansa

Nov 5

ORD12:40 pmChicago O'Hare Intl

14h 50m

2 stops

OPO9:30 amPorto

Nov 11

OPO6:00 amPorto

13h 10m

1 stop

ORD1:10 pmChicago O'Hare Intl

$813

Lufthansa

Jun 2

ORD4:05 pmChicago O'Hare Intl

17h 40m

1 stop

OPO3:45 pmPorto

Jun 16

OPO4:35 pmPorto

33h 20m

1 stop

ORD7:55 pmChicago O'Hare Intl

$1,060

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

Turkish Airlines

Oct 6

ORD8:10 pmChicago O'Hare Intl

37h 30m

1 stop

OPO3:40 pmPorto

Oct 22

OPO4:40 pmPorto

23h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$753

Turkish Airlines

Oct 14

ORD8:10 pmChicago O'Hare Intl

37h 35m

1 stop

OPO3:45 pmPorto

Oct 20

OPO10:40 amPorto

29h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$761

Turkish Airlines

Sep 24

ORD11:25 amChicago O'Hare Intl

22h 20m

1 stop

OPO3:45 pmPorto

Sep 29

OPO10:40 amPorto

29h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$765

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$607

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$608

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/2

7:15 pm-11:05 am

1 stop33h 50m

Porto

Sat 11/7

12:00 pm-4:45 pm

1 stop34h 45m

$638

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 11/5

7:15 pm-11:10 am

1 stop33h 55m

Porto

Wed 11/11

11:55 am-4:45 pm

1 stop34h 50m

$646

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/23

7:15 pm-11:05 am

1 stop33h 50m

Porto

Thu 11/26

5:50 pm-4:45 pm

1 stop28h 55m

$668

Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 8/30

6:00 pm-3:15 pm

1 stop15h 15m

Porto

Wed 12/9

8:30 am-3:30 pm

1 stop13h 00m

$740

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 8/30

9:24 am-10:40 am

2 stops19h 16m

Porto

Wed 12/9

5:00 am-9:45 pm

2 stops22h 45m

$883

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 7/26

10:25 am-10:00 pm

2 stops29h 35m

Porto

Tue 8/11

1:30 pm-9:40 am

1 stop26h 10m

$918

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 7/26

10:25 am-10:00 pm

2 stops29h 35m

Porto

Tue 8/11

1:30 pm-9:40 am

1 stop26h 10m

$923

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 8/30

1:27 pm-3:30 pm

2 stops20h 03m

Porto

Fri 9/11

5:00 am-9:46 pm

2 stops22h 46m

$945

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

Delays

Layovers

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

What is the cheapest month to fly to Porto?

The month of September is, on average, the cheapest month to fly to Porto from Chicago, with most prices found around $355. If you aren’t able to travel during the month of September, then book flights to Porto from Chicago during May instead. Flights to Porto in May, while not as cheap as those in September, still average around $372.

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 $733 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 $540 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 6% 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

Fastest flight time	14h 32m
Direct flights	None

The fastest flight from Chicago to Porto takes 14h 32m

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 14h 32m.
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 June 2026, there are 6 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 53% of the total bookings. Other popular airlines include United Airlines with 32%, Iberia with 8%, and Lufthansa with 7%.

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 $450	Free Cancellation	Rating 7.2 2,266 reviews	Search TAP AIR PORTUGAL flights
United Airlines	PriceFrom $497	Free Cancellation	Rating 7.4 9,778 reviews	Search United Airlines flights
Lufthansa	PriceFrom $507	Free Cancellation	Rating 6.8 8,035 reviews	Search Lufthansa flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,640 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,524 reviews	Search KLM flights
Iberia	PriceFrom $684	Free Cancellation	Rating 7.0 3,223 reviews	Search Iberia flights

Vila Nova de Gaia

Coimbra

Aveiro

Braga

Matosinhos

Lamego

Chaves

Esposende

Pinhao

Guimarães

Espinho

Arcos de Valdevez

Viseu

Ponte de Lima

Curia

Mesao Frio

Mira

Baiao

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

Wed 7/1

Wed 7/8

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 $365

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 7/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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

Find the cheapest flights from Chicago to Porto

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Lufthansa flights from Chicago to Porto

Our best Lufthansa deals on Chicago to Porto flight tickets

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines 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?

How often are flights from Chicago to Porto delayed?

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

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

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

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

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