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Cheap flights from Chicago O'Hare Intl Airport to Porto from $316

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 11/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
6:00 pm - 8:35 pm
ORD
-
OPO
20h 35m
1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 4:00 pm
OPO
-
ORD
23h 30m
1 stop
$621TAP AIR PORTUGAL
Sun, Sep 20 - Tue, Oct 6
TAP AIR PORTUGAL Logo
6:00 pm - 8:35 pm
ORD
-
OPO
20h 35m
1 stop
TAP AIR PORTUGAL Logo
10:30 pm - 4:00 pm
OPO
-
ORD
23h 30m
1 stop
$622TAP AIR PORTUGAL
Sun, Sep 20 - Tue, Oct 6
Multiple Airlines Logo
6:00 pm - 11:05 pm
ORD
-
OPO
23h 05m
2 stops
Multiple Airlines Logo
12:55 pm - 4:00 pm
OPO
-
ORD
33h 05m
2 stops
$680Multiple Airlines
Sun, Sep 20 - Tue, Oct 6
Multiple Airlines Logo
11:05 am - 7:00 pm
ORD
-
OPO
25h 55m
3 stops
Multiple Airlines Logo
9:15 pm - 4:58 pm
OPO
-
ORD
25h 43m
2 stops
$682Multiple Airlines
Wed, Sep 9 - Wed, Sep 16
Turkish Airlines Logo
9:15 pm - 3:25 pm
ORD
-
OPO
37h 10m
1 stop
Turkish Airlines Logo
4:25 pm - 7:20 pm
OPO
-
ORD
32h 55m
1 stop
$752Turkish Airlines
Tue, Oct 27 - Wed, Nov 4
Turkish Airlines Logo
8:10 pm - 3:40 pm
ORD
-
OPO
37h 30m
1 stop
Turkish Airlines Logo
4:40 pm - 6:15 pm
OPO
-
ORD
31h 35m
1 stop
$752Turkish Airlines
Tue, Oct 6 - Thu, Oct 22
United Airlines Logo
9:00 am - 9:30 am
ORD
-
OPO
18h 30m
1 stop
United Airlines Logo
6:00 am - 3:20 pm
OPO
-
ORD
15h 20m
1 stop
$763United Airlines
Sun, Nov 15 - Thu, Nov 19
United Airlines Logo
9:00 am - 9:30 am
ORD
-
OPO
18h 30m
1 stop
United Airlines Logo
6:00 am - 3:20 pm
OPO
-
ORD
15h 20m
1 stop
$764United Airlines
Sun, Nov 15 - Thu, Nov 19
Lufthansa Logo
4:20 pm - 12:50 pm
ORD
-
OPO
14h 30m
2 stops
Lufthansa Logo
12:35 pm - 1:10 pm
OPO
-
ORD
30h 35m
1 stop
$770Lufthansa
Sun, Jan 24 - Sun, Jan 31
Lufthansa Logo
4:20 pm - 11:45 am
ORD
-
OPO
13h 25m
1 stop
Lufthansa Logo
1:45 pm - 6:25 pm
OPO
-
ORD
34h 40m
1 stop
$793Lufthansa
Tue, Nov 24 - Sun, Nov 29

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

Our best Scandinavian Airlines deals on Chicago O'Hare Intl Airport to Porto flight tickets
Scandinavian Airlines
Nov 2
ORD7:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
Nov 8
OPO5:35 pmPorto
29h 10m
1 stop
ORD4:45 pmChicago O'Hare Intl
$723
Scandinavian Airlines
Oct 31
ORD8:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
Nov 4
OPO11:55 amPorto
34h 50m
1 stop
ORD4:45 pmChicago O'Hare Intl
$736
Scandinavian Airlines
Oct 26
ORD8:15 pmChicago O'Hare Intl
33h 50m
1 stop
OPO11:05 amPorto
Nov 5
OPO5:50 pmPorto
28h 55m
1 stop
ORD4:45 pmChicago O'Hare Intl
$756

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
Aug 13
ORD7:50 pmChicago O'Hare Intl
21h 10m
1 stop
OPO11:00 pmPorto
Aug 26
OPO10:30 pmPorto
20h 10m
1 stop
ORD12:40 pmChicago O'Hare Intl
$620
TAP AIR PORTUGAL
Sep 20
ORD6:00 pmChicago O'Hare Intl
20h 35m
1 stop
OPO8:35 pmPorto
Oct 6
OPO10:30 pmPorto
23h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$621
TAP AIR PORTUGAL
Sep 20
ORD6:00 pmChicago O'Hare Intl
20h 35m
1 stop
OPO8:35 pmPorto
Oct 6
OPO10:30 pmPorto
23h 30m
1 stop
ORD4:00 pmChicago O'Hare Intl
$622

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 August 1, 2026.
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

Sun 9/20

6:00 pm-8:35 pm

1 stop20h 35m

Porto

Tue 10/6

10:30 pm-4:00 pm

1 stop23h 30m

$621

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/20

6:00 pm-8:35 pm

1 stop20h 35m

Porto

Tue 10/6

10:30 pm-4:00 pm

1 stop23h 30m

$622

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 9/20

6:00 pm-11:05 pm

2 stops23h 05m

Porto

Tue 10/6

12:55 pm-4:00 pm

2 stops33h 05m

$680

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 9/9

11:05 am-7:00 pm

3 stops25h 55m

Porto

Wed 9/16

9:15 pm-4:58 pm

2 stops25h 43m

$682

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 10/27

9:15 pm-3:25 pm

1 stop37h 10m

Porto

Wed 11/4

4:25 pm-7:20 pm

1 stop32h 55m

$752

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 10/6

8:10 pm-3:40 pm

1 stop37h 30m

Porto

Thu 10/22

4:40 pm-6:15 pm

1 stop31h 35m

$752
Quickest round-trip

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/15

9:00 am-9:30 am

1 stop18h 30m

Porto

Thu 11/19

6:00 am-3:20 pm

1 stop15h 20m

$763

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/15

9:00 am-9:30 am

1 stop18h 30m

Porto

Thu 11/19

6:00 am-3:20 pm

1 stop15h 20m

$764

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 1/24

4:20 pm-12:50 pm

2 stops14h 30m

Porto

Sun 1/31

12:35 pm-1:10 pm

1 stop30h 35m

$770

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 11/24

4:20 pm-11:45 am

1 stop13h 25m

Porto

Sun 11/29

1:45 pm-6:25 pm

1 stop34h 40m

$793

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 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 $745 to $967.
The lowest price recently found on this route was $621.

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 April instead. Flights to Porto in April, while not as cheap as those in January, still average around $610.

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 $809 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 $621 on momondo.

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

You could potentially save up to 47% 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 August 2026, prices for Chicago O'Hare Intl Airport to Porto flights are approximately 13% 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 20m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Porto takes 11h 20m
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 20m.

  • 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 $451Free CancellationRating
7.2
2,353 reviews
Search TAP AIR PORTUGAL flights
LufthansaPriceFrom $474Free CancellationRating
6.8
8,176 reviews
Search Lufthansa flights
United AirlinesPriceFrom $489Free CancellationRating
7.4
10,061 reviews
Search United Airlines flights
IberiaPriceFrom $519Free CancellationRating
7.0
3,264 reviews
Search Iberia flights
American AirlinesPriceFrom $524Free CancellationRating
7.1
11,846 reviews
Search American Airlines flights
KLMPriceFrom $531Free CancellationRating
7.8
1,552 reviews
Search KLM flights
Turkish AirlinesPriceFrom $618Free CancellationRating
7.4
4,460 reviews
Search Turkish Airlines flights

Traveling to a place near Porto?

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