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

Lisbon (LIS) was the most common stop: 61% of momondo users choosing 1-stop flights on this route connected there.

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

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

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 airlines fly to Porto?

TAP AIR PORTUGAL, United Airlines and Lufthansa are the top three most popular airlines that fly to Porto from Chicago O'Hare Intl Airport according to our data. TAP AIR PORTUGAL is the first choice among our users, with 41% 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.

What is the cheapest airline that flies from Chicago O'Hare Intl to Porto?

United Airlines is the most popular carrier operating from Chicago O'Hare Intl to Porto

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

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

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

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

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

Prices for flights from Chicago O'Hare Intl Airport to Porto Airport refresh daily.

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

As of April 2026, there are 6 operators available to choose from for flights from Chicago O'Hare Intl Airport to Porto Airport.

How old do you have to be to fly from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Porto Airport.

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

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

$370 Cheap Flights from Chicago O'Hare Intl Airport to Porto in 2026

Q: What is the typical price of a round-trip flight between Chicago O'Hare Intl Airport and Porto?

Prices are currently low for flights on this route. Typical prices usually range from $1,062 to $705. The lowest price recently found on this route was $707.

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

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:10 pm - 3:45 pm

ORD

OPO

37h 35m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$707Turkish Airlines

Wed, Sep 2 - Wed, Sep 9

11:25 am - 3:45 pm

ORD

OPO

22h 20m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$708Turkish Airlines

Thu, Sep 3 - Wed, Sep 16

8:10 pm - 3:50 pm

ORD

OPO

37h 40m

1 stop

6:10 am - 9:40 am

OPO

ORD

33h 30m

1 stop

$728Turkish Airlines

Sun, Sep 20 - Thu, Oct 1

8:10 pm - 11:30 pm

ORD

OPO

21h 20m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$729Turkish Airlines

Thu, Oct 15 - Fri, Oct 23

11:25 am - 3:50 pm

ORD

OPO

22h 25m

1 stop

4:50 pm - 9:40 am

OPO

ORD

22h 50m

1 stop

$734Turkish Airlines

Mon, Sep 7 - Tue, Sep 15

11:25 am - 3:45 pm

ORD

OPO

22h 20m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$740Turkish Airlines

Thu, Sep 3 - Wed, Sep 16

8:10 pm - 3:45 pm

ORD

OPO

37h 35m

1 stop

4:50 pm - 9:40 am

OPO

ORD

22h 50m

1 stop

$742Turkish Airlines

Wed, Sep 9 - Mon, Sep 14

11:25 am - 3:45 pm

ORD

OPO

22h 20m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$745Turkish Airlines

Thu, Sep 3 - Fri, Sep 11

8:10 pm - 11:30 pm

ORD

OPO

21h 20m

1 stop

4:40 pm - 9:40 am

OPO

ORD

23h 00m

1 stop

$746Turkish Airlines

Sat, Sep 26 - Wed, Oct 7

11:25 am - 3:40 pm

ORD

OPO

22h 15m

1 stop

10:40 am - 9:40 am

OPO

ORD

29h 00m

1 stop

$755Turkish Airlines

Tue, Sep 1 - Fri, Sep 11

Turkish Airlines flights from Chicago O'Hare Intl Airport to Porto

Our best Turkish Airlines deals on Chicago O'Hare Intl Airport to Porto flight tickets

Turkish Airlines

Sep 2

ORD8:10 pmChicago O'Hare Intl

37h 35m

1 stop

OPO3:45 pmPorto

Sep 9

OPO4:40 pmPorto

23h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$707

Turkish Airlines

Sep 3

ORD11:25 amChicago O'Hare Intl

22h 20m

1 stop

OPO3:45 pmPorto

Sep 16

OPO4:40 pmPorto

23h 00m

1 stop

ORD9:40 amChicago O'Hare Intl

$708

Turkish Airlines

Sep 20

ORD8:10 pmChicago O'Hare Intl

37h 40m

1 stop

OPO3:50 pmPorto

Oct 1

OPO6:10 amPorto

33h 30m

1 stop

ORD9:40 amChicago O'Hare Intl

$728

TAP AIR PORTUGAL flights from Chicago O'Hare Intl Airport to Porto

Our best TAP AIR PORTUGAL deals on Chicago O'Hare Intl Airport to Porto flight tickets

TAP AIR PORTUGAL

Sep 23

ORD6:00 pmChicago O'Hare Intl

15h 00m

1 stop

OPO3:00 pmPorto

Oct 7

OPO10:30 pmPorto

20h 10m

1 stop

ORD12:40 pmChicago O'Hare Intl

$801

TAP AIR PORTUGAL

Sep 23

ORD6:00 pmChicago O'Hare Intl

15h 00m

1 stop

OPO3:00 pmPorto

Oct 7

OPO10:30 pmPorto

20h 10m

1 stop

ORD12:40 pmChicago O'Hare Intl

$802

TAP AIR PORTUGAL

Aug 20

ORD7:50 pmChicago O'Hare Intl

15h 00m

1 stop

OPO4:50 pmPorto

Aug 28

OPO5:05 amPorto

16h 55m

1 stop

ORD4:00 pmChicago O'Hare Intl

$830

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/2

8:10 pm-3:45 pm

1 stop37h 35m

Porto

Wed 9/9

4:40 pm-9:40 am

1 stop23h 00m

$707

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

$708

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/20

8:10 pm-3:50 pm

1 stop37h 40m

Porto

Thu 10/1

6:10 am-9:40 am

1 stop33h 30m

$728

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 10/15

8:10 pm-11:30 pm

1 stop21h 20m

Porto

Fri 10/23

10:40 am-9:40 am

1 stop29h 00m

$729

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 9/7

11:25 am-3:50 pm

1 stop22h 25m

Porto

Tue 9/15

4:50 pm-9:40 am

1 stop22h 50m

$734

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

$740

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/9

8:10 pm-3:45 pm

1 stop37h 35m

Porto

Mon 9/14

4:50 pm-9:40 am

1 stop22h 50m

$742

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 9/3

11:25 am-3:45 pm

1 stop22h 20m

Porto

Fri 9/11

10:40 am-9:40 am

1 stop29h 00m

$745

Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 9/26

8:10 pm-11:30 pm

1 stop21h 20m

Porto

Wed 10/7

4:40 pm-9:40 am

1 stop23h 00m

$746

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 9/1

11:25 am-3:40 pm

1 stop22h 15m

Porto

Fri 9/11

10:40 am-9:40 am

1 stop29h 00m

$755

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 O'Hare Intl Airport 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 O'Hare Intl Airport and Porto?

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 O'Hare Intl Airport, with most prices found around $558. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago O'Hare Intl Airport during November instead. Flights to Porto in November, while not as cheap as those in January, still average around $591.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Porto?

You are more likely to see cheaper flights to Porto from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $709 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Chicago O'Hare Intl Airport for as low as $520 on momondo.

Can stopping save me money on Chicago O'Hare Intl Airport to Porto flights?

You could potentially save up to 21% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Porto flight.

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

As of April 2026, prices for Chicago O'Hare Intl Airport to Porto flights are approximately 61% cheaper when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Porto 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 Porto (ORD to OPO) flight deals and tips

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

Fastest flight time	11h 15m
Direct flights	None

The fastest flight from Chicago O'Hare Intl Airport to Porto takes 11h 15m

There are no direct flights from Chicago O'Hare Intl Airport to Porto. There are no popular flight routes from Chicago O'Hare Intl Airport to Porto.

Search flight deals

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Porto

How far is Chicago O'Hare Intl to Porto by plane?
Porto is 3936.9 mi away from Chicago O'Hare Intl. A reasonable flight in good conditions will take 11h 15m.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Porto Airport?
Prices for flights from Chicago O'Hare Intl Airport to Porto Airport refresh daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Porto Airport?
As of April 2026, there are 6 operators available to choose from for flights from Chicago O'Hare Intl Airport to Porto Airport.
How old do you have to be to fly from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Porto Airport.
What documentation or ID do you need to fly to Porto Airport?
The travel and health documents you'll need for your trip to Porto 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 Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Chicago O'Hare Intl Airport to Porto?
Based on momondo bookings for flights between Chicago O'Hare Intl Airport and Porto, the leading airline is TAP AIR PORTUGAL, making up 37% of the total bookings. Other popular airlines include United Airlines with 33%, Lufthansa with 12%, and Iberia with 8%.

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

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

Airline	Rating	Free Cancellation	Price
TAP AIR PORTUGAL	PriceFrom $450	Free Cancellation	Rating 7.1 2,223 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $474	Free Cancellation	Rating 6.8 7,956 reviews	Search Lufthansa flights
Iberia	PriceFrom $519	Free Cancellation	Rating 7.0 3,202 reviews	Search Iberia flights
American Airlines	PriceFrom $524	Free Cancellation	Rating 7.1 11,675 reviews	Search American Airlines flights
KLM	PriceFrom $531	Free Cancellation	Rating 7.8 1,508 reviews	Search KLM flights
United Airlines	PriceFrom $541	Free Cancellation	Rating 7.4 9,672 reviews	Search United Airlines 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 collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Porto. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to Porto from Chicago with this policy.

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

Once all potential Chicago to Porto flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Chicago to Porto flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Porto trip

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Cheap flights from Chicago O'Hare Intl Airport to Porto from $370

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Turkish Airlines flights from Chicago O'Hare Intl Airport to Porto

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TAP AIR PORTUGAL flights from Chicago O'Hare Intl Airport to Porto

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

See travel insights to Porto from

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

What is the typical price of a round-trip flight between Chicago O'Hare Intl Airport and Porto?

What is the cheapest month to fly to Porto?

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Porto?

Can stopping save me money on Chicago O'Hare Intl Airport to Porto flights?

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

What is the cheapest airline that flies from Chicago O'Hare Intl 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 O'Hare Intl Airport and Porto?

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

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

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

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

Cheap Chicago O'Hare Intl Airport to Porto (ORD to OPO) flight deals and tips

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

Fastest flight time

Direct flights

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Porto

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

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport 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

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Find better results for your trip to Portugal

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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

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

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