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

Newark (EWR) has the shortest average layover time for this route: 1h 08m.

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.

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 39% 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.

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 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.

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

Flights connecting via Newark (EWR) have the shortest average one-way travel time: 10h 29m.

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

Flights via Madrid (MAD) offer the lowest average round-trip price of $689.

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

Lisbon (LIS) was the most common stop: 45% of momondo users choosing 1-stop flights on this route connected there.

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 April 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.

$348 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.

11:25 am - 3:45 pm

ORD

OPO

22h 20m

1 stop

10:45 am - 9:40 am

OPO

ORD

28h 55m

1 stop

$627Turkish Airlines

jue., sep. 3 - mié., sep. 16

11:25 am - 3:40 pm

ORD

OPO

22h 15m

1 stop

11:00 am - 9:40 am

OPO

ORD

28h 40m

1 stop

$628Turkish Airlines

mar., oct. 6 - jue., oct. 22

11:25 am - 9:40 am

ORD

OPO

16h 15m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$635Turkish Airlines

jue., sep. 10 - mié., sep. 16

11:25 am - 3:45 pm

ORD

OPO

22h 20m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$636Turkish Airlines

jue., sep. 3 - mié., sep. 16

8:10 pm - 3:40 pm

ORD

OPO

37h 30m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$637Turkish Airlines

jue., sep. 17 - vie., oct. 9

8:10 pm - 3:50 pm

ORD

OPO

37h 40m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$645Turkish Airlines

dom., sep. 6 - vie., sep. 18

1:00 pm - 10:25 am

MDW

OPO

15h 25m

2 stops

5:00 am - 9:45 pm

OPO

MDW

22h 45m

2 stops

$972Delta

dom., ago. 30 - mié., dic. 9

1:00 pm - 10:30 am

MDW

OPO

15h 30m

2 stops

5:00 am - 6:37 pm

OPO

MDW

19h 37m

2 stops

$990Delta

mar., sep. 29 - jue., oct. 8

6:38 pm - 3:30 pm

MDW

OPO

14h 52m

2 stops

5:00 am - 5:56 pm

OPO

MDW

18h 56m

2 stops

$1,000Delta

dom., may. 3 - jue., may. 14

10:25 am - 11:40 am

MDW

OPO

19h 15m

2 stops

1:30 pm - 9:40 am

OPO

MDW

26h 10m

1 stop

$1,065Multiple Airlines

mar., jun. 2 - jue., jun. 11

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

Turkish Airlines

Sep 3

ORD11:25 amChicago O'Hare Intl

22h 20m

1 stop

OPO3:45 pmPorto

Sep 16

OPO10:45 amPorto

28h 55m

1 stop

ORD9:40 amChicago O'Hare Intl

$627

Turkish Airlines

Oct 6

ORD11:25 amChicago O'Hare Intl

22h 15m

1 stop

OPO3:40 pmPorto

Oct 22

OPO11:00 amPorto

28h 40m

1 stop

ORD9:40 amChicago O'Hare Intl

$628

Turkish Airlines

Sep 10

ORD11:25 amChicago O'Hare Intl

16h 15m

1 stop

OPO9:40 amPorto

Sep 16

OPO4:40 pmPorto

23h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$635

TAP AIR PORTUGAL flights from Chicago to Porto

Our best TAP AIR PORTUGAL deals on Chicago to Porto flight tickets

TAP AIR PORTUGAL

Sep 23

ORD6:00 pmChicago O'Hare Intl

15h 00m

1 stop

OPO3:00 pmPorto

Oct 7

OPO7:00 amPorto

15h 00m

1 stop

ORD4:00 pmChicago O'Hare Intl

$830

TAP AIR PORTUGAL

Sep 23

ORD6:00 pmChicago O'Hare Intl

17h 00m

1 stop

OPO5:00 pmPorto

Oct 7

OPO10:00 amPorto

12h 00m

1 stop

ORD4:00 pmChicago O'Hare Intl

$831

TAP AIR PORTUGAL

Sep 23

ORD6:00 pmChicago O'Hare Intl

15h 00m

1 stop

OPO3:00 pmPorto

Oct 7

OPO10:00 amPorto

12h 00m

1 stop

ORD4:00 pmChicago O'Hare Intl

$838

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

jue. 9/3

11:25 am-3:45 pm

1 stop22h 20m

Porto

mié. 9/16

10:45 am-9:40 am

1 stop28h 55m

$627

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mar. 10/6

11:25 am-3:40 pm

1 stop22h 15m

Porto

jue. 10/22

11:00 am-9:40 am

1 stop28h 40m

$628

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

jue. 9/10

11:25 am-9:40 am

1 stop16h 15m

Porto

mié. 9/16

4:40 pm-9:40 am

1 stop23h 00m

$635

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

jue. 9/3

11:25 am-3:45 pm

1 stop22h 20m

Porto

mié. 9/16

4:40 pm-9:40 am

1 stop23h 00m

$636

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

jue. 9/17

8:10 pm-3:40 pm

1 stop37h 30m

Porto

vie. 10/9

10:40 am-9:40 am

1 stop29h 00m

$637

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

dom. 9/6

8:10 pm-3:50 pm

1 stop37h 40m

Porto

vie. 9/18

10:40 am-9:40 am

1 stop29h 00m

$645

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

dom. 8/30

1:00 pm-10:25 am

2 stops15h 25m

Porto

mié. 12/9

5:00 am-9:45 pm

2 stops22h 45m

$972

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

mar. 9/29

1:00 pm-10:30 am

2 stops15h 30m

Porto

jue. 10/8

5:00 am-6:37 pm

2 stops19h 37m

$990

Quickest round-trip

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

dom. 5/3

6:38 pm-3:30 pm

2 stops14h 52m

Porto

jue. 5/14

5:00 am-5:56 pm

2 stops18h 56m

$1,000

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

mar. 6/2

10:25 am-11:40 am

2 stops19h 15m

Porto

jue. 6/11

1:30 pm-9:40 am

1 stop26h 10m

$1,065

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?

How far in advance should I book a flight 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 $706 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 $520 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 16% 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	13h 45m
Direct flights	None

The fastest flight from Chicago to Porto takes 13h 45m

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 13h 45m.
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 April 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 46% of the total bookings. Other popular airlines include United Airlines with 37%, Iberia with 9%, and Lufthansa with 8%.

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 7.1 2,209 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $507	Free Cancellation	Rating 6.8 7,930 reviews	Search Lufthansa flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,182 reviews	Search Iberia flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,596 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,502 reviews	Search KLM flights
United Airlines	PriceFrom $541	Free Cancellation	Rating 7.4 9,605 reviews	Search United Airlines flights
Delta	PriceFrom $638	Free Cancellation	Rating 7.9 8,415 reviews	Search Delta flights

Vila Nova de Gaia

Coimbra

Braga

Aveiro

Matosinhos

Lamego

Esposende

Chaves

Pinhao

Guimarães

Espinho

Arcos de Valdevez

Ponte de Lima

Viseu

Curia

Penafiel

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

dom. 5/17

dom. 5/24

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 $348

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 5/3. 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

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

TAP AIR PORTUGAL flights from Chicago to Porto

Our best TAP AIR PORTUGAL 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?

How far in advance should I book a flight 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