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.

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 airlines fly to Porto?

United Airlines, TAP AIR PORTUGAL and Lufthansa are the top three most popular airlines that fly to Porto from Chicago according to our data. United Airlines is the first choice among our users, with 42% 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 Frankfurt am Main (FRA) offer the lowest average round-trip price of $629.

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

Lisbon (LIS) was the most common stop: 40% of momondo users choosing 1-stop flights on this route connected there.

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 cheapest airline that flies from Chicago to Porto?

Delta and United Airlines 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 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.

$295 Cheap Flights from Chicago to Porto in 2026

Q: 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 $774 to $554. The lowest price recently found on this route was $587.

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Find the cheapest flights from Chicago to Porto

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

8:10 pm - 9:45 am

ORD

OPO

31h 35m

1 stop

11:00 am - 9:40 am

OPO

ORD

28h 40m

1 stop

$587Turkish Airlines

Thu, Apr 23 - Thu, Apr 30

11:25 am - 3:45 pm

ORD

OPO

22h 20m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$597Turkish Airlines

Thu, Sep 3 - Wed, Sep 16

11:25 am - 3:45 pm

ORD

OPO

22h 20m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$607Turkish Airlines

Thu, Sep 17 - Fri, Oct 9

8:10 pm - 11:30 pm

ORD

OPO

21h 20m

1 stop

6:30 am - 9:40 am

OPO

ORD

33h 10m

1 stop

$620Turkish Airlines

Thu, Apr 23 - Mon, Apr 27

8:10 pm - 3:40 pm

ORD

OPO

37h 30m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$621Turkish Airlines

Thu, Apr 23 - Mon, Apr 27

11:25 am - 3:45 pm

ORD

OPO

22h 20m

1 stop

10:45 am - 9:40 am

OPO

ORD

28h 55m

1 stop

$622Turkish Airlines

Thu, Sep 3 - Wed, Sep 16

1:24 pm - 3:25 pm

MDW

OPO

20h 01m

2 stops

5:00 am - 4:26 pm

OPO

MDW

17h 26m

2 stops

$809Delta

Tue, Apr 28 - Tue, May 5

9:29 am - 10:40 am

MDW

OPO

19h 11m

2 stops

5:00 am - 5:58 pm

OPO

MDW

18h 58m

2 stops

$813Delta

Wed, Apr 29 - Wed, May 6

9:27 am - 10:40 am

MDW

OPO

19h 13m

2 stops

5:55 am - 6:33 pm

OPO

MDW

18h 38m

2 stops

$896Delta

Sun, May 3 - Sun, May 10

9:14 am - 3:05 pm

MDW

OPO

23h 51m

2 stops

1:30 pm - 9:45 am

OPO

MDW

26h 15m

1 stop

$947Multiple Airlines

Sat, Apr 25 - Mon, May 4

Air Canada flights from Chicago to Porto

Our best Air Canada deals on Chicago to Porto flight tickets

Air Canada

Apr 6

ORD2:00 pmChicago O'Hare Intl

16h 05m

2 stops

OPO12:05 pmPorto

Apr 21

OPO8:40 amPorto

16h 45m

2 stops

ORD7:25 pmChicago O'Hare Intl

$952

Air Canada

Apr 6

ORD2:00 pmChicago O'Hare Intl

16h 05m

2 stops

OPO12:05 pmPorto

Apr 21

OPO8:40 amPorto

16h 45m

2 stops

ORD7:25 pmChicago O'Hare Intl

$954

Turkish Airlines flights from Chicago to Porto

Our best Turkish Airlines deals on Chicago to Porto flight tickets

Turkish Airlines

Apr 6

ORD8:10 pmChicago O'Hare Intl

37h 30m

1 stop

OPO3:40 pmPorto

Apr 21

OPO4:50 pmPorto

22h 50m

1 stop

ORD9:40 amChicago O'Hare Intl

$587

Turkish Airlines

Apr 6

ORD8:10 pmChicago O'Hare Intl

37h 30m

1 stop

OPO3:40 pmPorto

Apr 21

OPO10:40 amPorto

29h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$593

Turkish Airlines

Apr 6

ORD8:10 pmChicago O'Hare Intl

31h 35m

1 stop

OPO9:45 amPorto

Apr 22

OPO10:45 amPorto

28h 55m

1 stop

ORD9:40 amChicago O'Hare Intl

$595

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 4/23

8:10 pm-9:45 am

1 stop31h 35m

Porto

Thu 4/30

11:00 am-9:40 am

1 stop28h 40m

$587

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 9/3

11:25 am-3:45 pm

1 stop22h 20m

Porto

Wed 9/16

4:40 pm-9:40 am

1 stop23h 00m

$597

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 9/17

11:25 am-3:45 pm

1 stop22h 20m

Porto

Fri 10/9

10:40 am-9:40 am

1 stop29h 00m

$607

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 4/23

8:10 pm-11:30 pm

1 stop21h 20m

Porto

Mon 4/27

6:30 am-9:40 am

1 stop33h 10m

$620

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 4/23

8:10 pm-3:40 pm

1 stop37h 30m

Porto

Mon 4/27

10:40 am-9:40 am

1 stop29h 00m

$621

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 9/3

11:25 am-3:45 pm

1 stop22h 20m

Porto

Wed 9/16

10:45 am-9:40 am

1 stop28h 55m

$622

Quickest round-trip

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Tue 4/28

1:24 pm-3:25 pm

2 stops20h 01m

Porto

Tue 5/5

5:00 am-4:26 pm

2 stops17h 26m

$809

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Wed 4/29

9:29 am-10:40 am

2 stops19h 11m

Porto

Wed 5/6

5:00 am-5:58 pm

2 stops18h 58m

$813

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sun 5/3

9:27 am-10:40 am

2 stops19h 13m

Porto

Sun 5/10

5:55 am-6:33 pm

2 stops18h 38m

$896

ChicagoPorto

MDW - OPO

MDWOPO

Chicago Midway

Sat 4/25

9:14 am-3:05 pm

2 stops23h 51m

Porto

Mon 5/4

1:30 pm-9:45 am

1 stop26h 15m

$947

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 $699 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 $479 on momondo.

Can stopping save me money on Chicago to Porto flights?

You could potentially save up to 15% 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	11h 55m
Direct flights	None

The fastest flight from Chicago to Porto takes 11h 55m

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

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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 11h 55m.
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 42% of the total bookings. Other popular airlines include United Airlines with 40%, Iberia with 9%, and Lufthansa 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 $450	Free Cancellation	Rating 7.1 2,188 reviews	Search TAP AIR PORTUGAL flights
Iberia	PriceFrom $497	Free Cancellation	Rating 7.0 3,164 reviews	Search Iberia flights
Lufthansa	PriceFrom $507	Free Cancellation	Rating 6.8 7,885 reviews	Search Lufthansa flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,552 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.7 1,485 reviews	Search KLM flights
United Airlines	PriceFrom $552	Free Cancellation	Rating 7.4 9,536 reviews	Search United Airlines flights
Delta	PriceFrom $638	Free Cancellation	Rating 7.9 8,373 reviews	Search Delta flights

Vila Nova de Gaia

Coimbra

Aveiro

Braga

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

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Cheap flights from Chicago to Porto from $295

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 4/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Air Canada flights from Chicago to Porto

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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

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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

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Why use momondo?

An easier way to manage your Porto trip

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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.

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