Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Chicago O'Hare Intl Airport to Porto from $297

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
8:10 pm - 3:00 pmORD  Chicago O'Hare Intl-OPO Porto
12h 50m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
5:00 am - 3:30 pmOPO  Porto-ORD Chicago O'Hare Intl
16h 30m1 stop Lisbon Humberto Delgado
$549TAP AIR PORTUGAL
Sun, Dec 6 - Sun, Dec 13
TAP AIR PORTUGAL Logo
8:10 pm - 1:30 pmORD  Chicago O'Hare Intl-OPO Porto
11h 20m1 stop Lisbon Humberto Delgado
TAP AIR PORTUGAL Logo
6:00 pm - 3:30 pmOPO  Porto-ORD Chicago O'Hare Intl
27h 30m1 stop Lisbon Humberto Delgado
$549TAP AIR PORTUGAL
Sun, Dec 6 - Tue, Dec 22
Scandinavian Airlines Logo
7:10 pm - 11:05 amORD  Chicago O'Hare Intl-OPO Porto
33h 55m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
11:55 am - 5:45 pmOPO  Porto-ORD Chicago O'Hare Intl
34h 50m1 stop Kastrup Copenhagen
$674Scandinavian Airlines
Sat, Mar 6 - Wed, Mar 17
Scandinavian Airlines Logo
7:10 pm - 11:05 amORD  Chicago O'Hare Intl-OPO Porto
33h 55m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
5:45 pm - 4:45 pmOPO  Porto-ORD Chicago O'Hare Intl
29h 00m1 stop Kastrup Copenhagen
$674Scandinavian Airlines
Sat, Mar 6 - Fri, Mar 12
Lufthansa Logo
4:20 pm - 11:45 amORD  Chicago O'Hare Intl-OPO Porto
13h 25m1 stop Frankfurt am Main
Lufthansa Logo
6:00 am - 1:10 pmOPO  Porto-ORD Chicago O'Hare Intl
13h 10m1 stop Frankfurt am Main
$720Lufthansa
Tue, Feb 9 - Tue, Feb 16
United Airlines Logo
4:45 pm - 9:30 amORD  Chicago O'Hare Intl-OPO Porto
11h 45m1 stop Newark
United Airlines Logo
6:00 am - 2:50 pmOPO  Porto-ORD Chicago O'Hare Intl
14h 50m1 stop Frankfurt am Main
$732United Airlines
Tue, Mar 23 - Tue, Mar 30
United Airlines Logo
2:30 pm - 9:30 amORD  Chicago O'Hare Intl-OPO Porto
13h 00m1 stop Newark
United Airlines Logo
6:00 am - 3:20 pmOPO  Porto-ORD Chicago O'Hare Intl
15h 20m1 stop Frankfurt am Main
$733United Airlines
Sun, Mar 7 - Thu, Mar 11
Iberia Logo
11:30 am - 7:40 amORD  Chicago O'Hare Intl-OPO Porto
14h 10m2 stops New York John F Kennedy Intl Madrid Barajas
Iberia Logo
8:20 am - 9:00 pmOPO  Porto-ORD Chicago O'Hare Intl
18h 40m2 stops Madrid Barajas Boston Logan Intl
$736Iberia
Wed, Apr 7 - Wed, Apr 14
Lufthansa Logo
9:50 pm - 11:40 pmORD  Chicago O'Hare Intl-OPO Porto
19h 50m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:00 am - 1:10 pmOPO  Porto-ORD Chicago O'Hare Intl
13h 10m1 stop Frankfurt am Main
$752Lufthansa
Fri, Feb 5 - Fri, Feb 12
Iberia Logo
5:40 pm - 11:45 amORD  Chicago O'Hare Intl-OPO Porto
12h 05m1 stop Madrid Barajas
Iberia Logo
9:55 pm - 1:45 pmOPO  Porto-ORD Chicago O'Hare Intl
21h 50m2 stops Barcelona-El Prat London Heathrow
$770Iberia
Wed, Feb 10 - Mon, Feb 15

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
Apr 7
ORD5:10 pmChicago O'Hare Intl
16h 15m
1 stop
OPO3:25 pmPorto
Apr 23
OPO5:00 amPorto
15h 15m
1 stop
ORD2:15 pmChicago O'Hare Intl
$732
Delta
Apr 7
ORD1:30 pmChicago O'Hare Intl
19h 55m
2 stops
OPO3:25 pmPorto
Apr 22
OPO11:45 amPorto
32h 30m
1 stop
ORD2:15 pmChicago O'Hare Intl
$737
Delta
Mar 6
ORD1:10 pmChicago O'Hare Intl
26h 50m
2 stops
OPO10:00 pmPorto
Mar 16
OPO11:15 amPorto
33h 10m
1 stop
ORD3:25 pmChicago O'Hare Intl
$739

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
Mar 7
ORD2:30 pmChicago O'Hare Intl
13h 00m
1 stop
OPO9:30 amPorto
Mar 11
OPO6:00 amPorto
15h 20m
1 stop
ORD3:20 pmChicago O'Hare Intl
$733
United Airlines
Mar 7
ORD2:30 pmChicago O'Hare Intl
13h 00m
1 stop
OPO9:30 amPorto
Mar 11
OPO6:00 amPorto
15h 20m
1 stop
ORD3:20 pmChicago O'Hare Intl
$734
United Airlines
Mar 7
ORD1:30 pmChicago O'Hare Intl
14h 00m
2 stops
OPO9:30 amPorto
Mar 11
OPO6:00 amPorto
15h 20m
1 stop
ORD3:20 pmChicago O'Hare Intl
$738

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 Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 12/6

8:10 pm-3:00 pm

1 stop12h 50m

Porto

Sun 12/13

5:00 am-3:30 pm

1 stop16h 30m

$549

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 12/6

8:10 pm-1:30 pm

1 stop11h 20m

Porto

Tue 12/22

6:00 pm-3:30 pm

1 stop27h 30m

$549

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sat 3/6

7:10 pm-11:05 am

1 stop33h 55m

Porto

Wed 3/17

11:55 am-5:45 pm

1 stop34h 50m

$674

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sat 3/6

7:10 pm-11:05 am

1 stop33h 55m

Porto

Fri 3/12

5:45 pm-4:45 pm

1 stop29h 00m

$674
Quickest round-trip

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 2/9

4:20 pm-11:45 am

1 stop13h 25m

Porto

Tue 2/16

6:00 am-1:10 pm

1 stop13h 10m

$720

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Tue 3/23

4:45 pm-9:30 am

1 stop11h 45m

Porto

Tue 3/30

6:00 am-2:50 pm

1 stop14h 50m

$732

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Sun 3/7

2:30 pm-9:30 am

1 stop13h 00m

Porto

Thu 3/11

6:00 am-3:20 pm

1 stop15h 20m

$733

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 4/7

11:30 am-7:40 am

2 stops14h 10m

Porto

Wed 4/14

8:20 am-9:00 pm

2 stops18h 40m

$736

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Fri 2/5

9:50 pm-11:40 pm

1 stop19h 50m

Porto

Fri 2/12

6:00 am-1:10 pm

1 stop13h 10m

$752

ChicagoPorto

ORD Chicago O'Hare Intl - OPO Porto

ORDOPO

Chicago O'Hare Intl

Wed 2/10

5:40 pm-11:45 am

1 stop12h 05m

Porto

Mon 2/15

9:55 pm-1:45 pm

2 stops21h 50m

$770

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $660 to $1,004.
The lowest price recently found on this route was $549.

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 $564. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago O'Hare Intl Airport during February instead. Flights to Porto in February, while not as cheap as those in January, still average around $689.

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 week ahead of your departure date. In general, you can expect to find flights to Porto for around $890 when searching week 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 $687 on momondo.

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

You could potentially save up to 11% 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 November 2026, prices for Chicago O'Hare Intl Airport to Porto flights are approximately 37% 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

Best Price Found

$297

Fastest flight time

11h 20m

Direct flights

None
The best one-way flight to Porto from Chicago O'Hare Intl Airport in the past 72 hours is $297. The best round-trip flight deal from Chicago O'Hare Intl Airport to Porto found on momondo in the last 72 hours is $549.
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 $480Free CancellationRating
7.2
2,395 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $519Free CancellationRating
7.0
3,231 reviews
Search Iberia flights
LufthansaPriceFrom $545Free CancellationRating
6.8
8,291 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $630Free CancellationRating
7.4
4,467 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $658Free CancellationRating
7.3
10,479 reviews
Search United Airlines flights

Traveling to a place near Porto?

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

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

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
Wed 12/9
Wed 12/16
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal