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Cheap flights from Chicago O'Hare Intl Airport to Porto from $237

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 O'Hare Intl Airport to Porto departing on 9/22. 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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Find the cheapest flights from Chicago O'Hare Intl Airport to Porto

Cheap round-trip flights

United Airlines Logo
4:20 pm - 9:30 amORD-OPO
11h 10m1 stop
United Airlines Logo
12:30 pm - 8:05 pmOPO-ORD
13h 35m1 stop
$484United Airlines
Find Deal
Wed, Nov 5 - Wed, Nov 12
United Airlines Logo
4:20 pm - 9:30 amORD-OPO
11h 10m1 stop
United Airlines Logo
6:00 am - 1:10 pmOPO-ORD
13h 10m1 stop
$485United Airlines
Find Deal
Wed, Nov 12 - Tue, Nov 25
TAP AIR PORTUGAL Logo
8:10 pm - 3:05 pmORD-OPO
13h 55m1 stop
TAP AIR PORTUGAL Logo
8:55 am - 3:00 pmOPO-ORD
12h 05m1 stop
$486TAP AIR PORTUGAL
Find Deal
Wed, Oct 29 - Sun, Nov 9
TAP AIR PORTUGAL Logo
6:00 pm - 6:55 pmORD-OPO
18h 55m1 stop
TAP AIR PORTUGAL Logo
9:00 am - 4:10 pmOPO-ORD
13h 10m1 stop
$487TAP AIR PORTUGAL
Find Deal
Thu, Oct 9 - Fri, Oct 24
United Airlines Logo
12:45 pm - 9:30 amORD-OPO
14h 45m2 stops
United Airlines Logo
12:30 pm - 8:05 pmOPO-ORD
13h 35m1 stop
$489United Airlines
Find Deal
Mon, Nov 17 - Thu, Dec 4
Iberia Logo
9:40 am - 11:45 amORD-OPO
20h 05m2 stops
Iberia Logo
8:40 pm - 5:38 pmOPO-ORD
26h 58m2 stops
$513Iberia
Find Deal
Wed, Nov 5 - Wed, Nov 12
Delta Logo
7:30 am - 10:30 amORD-OPO
21h 00m2 stops
Delta Logo
6:05 am - 9:31 pmOPO-ORD
21h 26m2 stops
$546Delta
Find Deal
Mon, Nov 17 - Tue, Dec 2
Lufthansa Logo
9:50 pm - 11:45 pmORD-OPO
19h 55m1 stop
Lufthansa Logo
6:00 am - 8:05 pmOPO-ORD
20h 05m1 stop
$549Lufthansa
Find Deal
Wed, Dec 31 - Wed, Jan 7
Lufthansa Logo
10:50 pm - 11:45 pmORD-OPO
19h 55m1 stop
Lufthansa Logo
6:00 am - 1:10 pmOPO-ORD
13h 10m1 stop
$550Lufthansa
Find Deal
Wed, Oct 29 - Sun, Nov 9
Iberia Logo
11:40 am - 7:40 amORD-OPO
14h 00m2 stops
Iberia Logo
8:20 am - 2:30 pmOPO-ORD
12h 10m1 stop
$553Iberia
Find Deal
Wed, Jan 14 - Sat, Jan 24

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

Our best United Airlines deals on Chicago O'Hare Intl Airport to Porto flight tickets
United Airlines
Nov 5
ORD4:20 pmChicago O'Hare Intl
11h 10m
1 stop
OPO9:30 amPorto
Nov 12
OPO12:30 pmPorto
13h 35m
1 stop
ORD8:05 pmChicago O'Hare Intl
$484
Find similar
United Airlines
Nov 12
ORD4:20 pmChicago O'Hare Intl
11h 10m
1 stop
OPO9:30 amPorto
Nov 25
OPO6:00 amPorto
13h 10m
1 stop
ORD1:10 pmChicago O'Hare Intl
$485
Find similar
United Airlines
Nov 17
ORD12:45 pmChicago O'Hare Intl
14h 45m
2 stops
OPO9:30 amPorto
Dec 4
OPO12:30 pmPorto
13h 35m
1 stop
ORD8:05 pmChicago O'Hare Intl
$489
Find similar

Delta flights from Chicago O'Hare Intl Airport to Porto

Our best Delta deals on Chicago O'Hare Intl Airport to Porto flight tickets
Delta
Nov 17
ORD7:30 amChicago O'Hare Intl
21h 00m
2 stops
OPO10:30 amPorto
Dec 2
OPO6:05 amPorto
21h 26m
2 stops
ORD9:31 pmChicago O'Hare Intl
$546
Find similar
Delta
Aug 11
ORD5:10 pmChicago O'Hare Intl
16h 20m
1 stop
OPO3:30 pmPorto
Aug 27
OPO6:15 amPorto
14h 25m
1 stop
ORD2:40 pmChicago O'Hare Intl
$627
Find similar
Delta
Aug 11
ORD5:10 pmChicago O'Hare Intl
16h 20m
1 stop
OPO3:30 pmPorto
Aug 27
OPO6:15 amPorto
21h 39m
2 stops
ORD9:54 pmChicago O'Hare Intl
$637
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 31, 2025.
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

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/5

4:20 pm-9:30 am

1 stop11h 10m

Porto

Wed 11/12

12:30 pm-8:05 pm

1 stop13h 35m

$484

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/12

4:20 pm-9:30 am

1 stop11h 10m

Porto

Tue 11/25

6:00 am-1:10 pm

1 stop13h 10m

$485

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/29

8:10 pm-3:05 pm

1 stop13h 55m

Porto

Sun 11/9

8:55 am-3:00 pm

1 stop12h 05m

$486

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 10/9

6:00 pm-6:55 pm

1 stop18h 55m

Porto

Fri 10/24

9:00 am-4:10 pm

1 stop13h 10m

$487

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/17

12:45 pm-9:30 am

2 stops14h 45m

Porto

Thu 12/4

12:30 pm-8:05 pm

1 stop13h 35m

$489

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/5

9:40 am-11:45 am

2 stops20h 05m

Porto

Wed 11/12

8:40 pm-5:38 pm

2 stops26h 58m

$513

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/17

7:30 am-10:30 am

2 stops21h 00m

Porto

Tue 12/2

6:05 am-9:31 pm

2 stops21h 26m

$546

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 12/31

9:50 pm-11:45 pm

1 stop19h 55m

Porto

Wed 1/7

6:00 am-8:05 pm

1 stop20h 05m

$549

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/29

10:50 pm-11:45 pm

1 stop19h 55m

Porto

Sun 11/9

6:00 am-1:10 pm

1 stop13h 10m

$550

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 1/14

11:40 am-7:40 am

2 stops14h 00m

Porto

Sat 1/24

8:20 am-2:30 pm

1 stop12h 10m

$553

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

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

What is the cheapest month to fly to Porto?

The month of February is, on average, the cheapest month to fly to Porto from Chicago O'Hare Intl Airport, with most prices found around $492. If you aren’t able to travel during the month of February, 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 February, still average around $548.

What is the cheapest day to depart on your flight to Porto?

The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $708. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $808. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

What is the cheapest time of day to depart on your flight to Porto?

In the evening is the cheapest time of day to fly from Chicago O'Hare Intl Airport to Porto when you can find flight prices for as low as $611. Flying to Porto in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,018 on average. Flights to Porto from Chicago O'Hare Intl Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight 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 $681 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 $619 on momondo.

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

Best Price Found

$237

Fastest flight time

9h 59m

Direct flights

None

Airports in Porto

1 airport
The best one-way flight to Porto from Chicago O'Hare Intl Airport in the past 72 hours is $237. The best round-trip flight deal from Chicago O'Hare Intl Airport to Porto found on momondo in the last 72 hours is $484.
The fastest flight from Chicago O'Hare Intl Airport to Porto takes 9h 59m
There are no direct flights from Chicago O'Hare Intl Airport to Porto. Popular non-direct route for this connection is Chicago O'Hare Intl Airport - Porto Airport.
There is 1 airport near Porto: Porto (OPO)
Search flight deals

  • 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 9h 59m.

  • 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?

  • 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?

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 PORTUGALPriceFrom $415Free CancellationRating
7.1
1,933 reviews
Search TAP AIR PORTUGAL flights
American AirlinesPriceFrom $468Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
IberiaPriceFrom $473Free CancellationRating
7.0
2,859 reviews
Search Iberia flights
DeltaPriceFrom $498Free CancellationRating
8.0
7,981 reviews
Search Delta flights
British AirwaysPriceFrom $504Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
LufthansaPriceFrom $526Free CancellationRating
6.8
7,275 reviews
Search Lufthansa flights
SWISSPriceFrom $558Free CancellationRating
7.5
1,686 reviews
Search SWISS flights
KLMPriceFrom $563Free CancellationRating
7.8
1,383 reviews
Search KLM flights
United AirlinesPriceFrom $564Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Aveiro
Vila Nova de Gaia
Coimbra
Matosinhos
Braga
Caminha
Guimarães
Chaves
Esposende
Lamego
Arcos de Valdevez
Espinho
Viseu
Ponte de Lima
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
Pinhao
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.

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