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Cheap flights from Chicago to Porto from $262

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 11/19. 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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0 bags

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Cheap round-trip flights

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Scandinavian Airlines Logo
7:00 am - 11:00 amORD-OPO
22h 00m2 stops
Scandinavian Airlines Logo
5:55 pm - 4:10 pmOPO-ORD
28h 15m1 stop
$421Scandinavian Airlines
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mar., abr. 14 - dom., abr. 19
TAP AIR PORTUGAL Logo
7:10 pm - 5:00 pmORD-OPO
15h 50m1 stop
TAP AIR PORTUGAL Logo
4:55 pm - 2:45 pmOPO-ORD
27h 50m1 stop
$425TAP AIR PORTUGAL
Find Deal
mié., ene. 14 - sáb., ene. 24
United Airlines Logo
4:10 pm - 9:30 amORD-OPO
11h 20m1 stop
United Airlines Logo
6:00 am - 3:20 pmOPO-ORD
15h 20m1 stop
$474United Airlines
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dom., feb. 22 - vie., mar. 6
Delta Logo
5:20 pm - 10:30 amORD-OPO
11h 10m1 stop
Delta Logo
11:15 am - 2:20 pmOPO-ORD
33h 05m1 stop
$477Delta
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lun., feb. 23 - mar., mar. 3
United Airlines Logo
11:15 am - 9:30 amORD-OPO
16h 15m2 stops
United Airlines Logo
6:00 am - 3:20 pmOPO-ORD
15h 20m1 stop
$478United Airlines
Find Deal
dom., feb. 22 - vie., mar. 6
Lufthansa Logo
9:50 pm - 11:40 pmORD-OPO
19h 50m1 stop
Lufthansa Logo
1:45 pm - 7:25 pmOPO-ORD
34h 40m1 stop
$480Lufthansa
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mié., feb. 25 - lun., mar. 9
Air Canada Logo
7:15 am - 12:05 pmORD-OPO
22h 50m2 stops
Air Canada Logo
6:00 am - 1:01 pmOPO-ORD
37h 01m2 stops
$484Air Canada
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lun., feb. 23 - vie., mar. 6
Air Canada Logo
3:55 pm - 12:50 pmORD-OPO
15h 55m2 stops
Air Canada Logo
11:05 am - 8:05 amOPO-ORD
27h 00m2 stops
$486Air Canada
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lun., mar. 23 - mar., mar. 31
Delta Logo
5:20 pm - 10:30 amORD-OPO
11h 10m1 stop
Delta Logo
11:15 am - 9:27 amOPO-ORD
28h 12m2 stops
$487Delta
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dom., feb. 22 - mar., mar. 3
Lufthansa Logo
4:20 pm - 2:45 pmORD-OPO
16h 25m1 stop
Lufthansa Logo
1:45 pm - 6:25 pmOPO-ORD
34h 40m1 stop
$500Lufthansa
Find Deal
mar., nov. 25 - mar., dic. 2

SWISS flights from Chicago to Porto

Our best SWISS deals on Chicago to Porto flight tickets
SWISS
Feb 23
ORD6:50 pmChicago O'Hare Intl
17h 45m
1 stop
OPO6:35 pmPorto
Mar 9
OPO12:05 pmPorto
34h 15m
1 stop
ORD5:20 pmChicago O'Hare Intl
$463
Find similar
SWISS
Feb 11
ORD6:50 pmChicago O'Hare Intl
17h 45m
1 stop
OPO6:35 pmPorto
Feb 16
OPO12:05 pmPorto
34h 15m
1 stop
ORD4:20 pmChicago O'Hare Intl
$469
Find similar
SWISS
Feb 23
ORD6:50 pmChicago O'Hare Intl
36h 35m
2 stops
OPO1:25 pmPorto
Mar 9
OPO7:20 pmPorto
27h 00m
1 stop
ORD5:20 pmChicago O'Hare Intl
$516
Find similar

TAP AIR PORTUGAL flights from Chicago to Porto

Our best TAP AIR PORTUGAL deals on Chicago to Porto flight tickets
TAP AIR PORTUGAL
Nov 12
ORD7:10 pmChicago O'Hare Intl
13h 55m
1 stop
OPO3:05 pmPorto
Nov 19
OPO8:55 amPorto
12h 05m
1 stop
ORD3:00 pmChicago O'Hare Intl
$425
Find similar
TAP AIR PORTUGAL
Nov 12
ORD7:10 pmChicago O'Hare Intl
15h 50m
1 stop
OPO5:00 pmPorto
Nov 18
OPO6:00 pmPorto
27h 00m
1 stop
ORD3:00 pmChicago O'Hare Intl
$440
Find similar
TAP AIR PORTUGAL
Nov 12
ORD7:10 pmChicago O'Hare Intl
32h 45m
1 stop
OPO9:55 amPorto
Nov 19
OPO8:55 amPorto
12h 05m
1 stop
ORD3:00 pmChicago O'Hare Intl
$444
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago 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 noviembre 4, 2025.
Use the filters below to find and compare flights from Chicago to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mar. 4/14

7:00 am-11:00 am

2 stops22h 00m

Porto

dom. 4/19

5:55 pm-4:10 pm

1 stop28h 15m

$421

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mié. 1/14

7:10 pm-5:00 pm

1 stop15h 50m

Porto

sáb. 1/24

4:55 pm-2:45 pm

1 stop27h 50m

$425

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

dom. 2/22

4:10 pm-9:30 am

1 stop11h 20m

Porto

vie. 3/6

6:00 am-3:20 pm

1 stop15h 20m

$474

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

lun. 2/23

5:20 pm-10:30 am

1 stop11h 10m

Porto

mar. 3/3

11:15 am-2:20 pm

1 stop33h 05m

$477

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

dom. 2/22

11:15 am-9:30 am

2 stops16h 15m

Porto

vie. 3/6

6:00 am-3:20 pm

1 stop15h 20m

$478

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mié. 2/25

9:50 pm-11:40 pm

1 stop19h 50m

Porto

lun. 3/9

1:45 pm-7:25 pm

1 stop34h 40m

$480

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

lun. 2/23

7:15 am-12:05 pm

2 stops22h 50m

Porto

vie. 3/6

6:00 am-1:01 pm

2 stops37h 01m

$484

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

lun. 3/23

3:55 pm-12:50 pm

2 stops15h 55m

Porto

mar. 3/31

11:05 am-8:05 am

2 stops27h 00m

$486

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

dom. 2/22

5:20 pm-10:30 am

1 stop11h 10m

Porto

mar. 3/3

11:15 am-9:27 am

2 stops28h 12m

$487

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

mar. 11/25

4:20 pm-2:45 pm

1 stop16h 25m

Porto

mar. 12/2

1:45 pm-6:25 pm

1 stop34h 40m

$500

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 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 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, with most prices found around $593. If you aren’t able to travel during the month of January, then book flights to Porto from Chicago during April instead. Flights to Porto in April, while not as cheap as those in January, still average around $616.

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 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 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 when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $677 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 $622 on momondo.

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

Direct flights

None
There are no direct flights from Chicago to Porto. There are no popular flight routes from Chicago to Porto.
Search flight deals

  • 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 10m.

  • 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?

  • 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?

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 PORTUGALPriceFrom $464Free CancellationRating
7.1
2,046 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $487Free CancellationRating
7.0
3,006 reviews
Search Iberia flights
British AirwaysPriceFrom $504Free CancellationRating
6.7
7,494 reviews
Search British Airways flights
LufthansaPriceFrom $526Free CancellationRating
6.8
7,547 reviews
Search Lufthansa flights
KLMPriceFrom $531Free CancellationRating
7.7
1,405 reviews
Search KLM flights
United AirlinesPriceFrom $545Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
American AirlinesPriceFrom $554Free CancellationRating
7.2
11,038 reviews
Search American Airlines flights
SWISSPriceFrom $558Free CancellationRating
7.5
1,776 reviews
Search SWISS flights
DeltaPriceFrom $638Free CancellationRating
7.9
8,002 reviews
Search Delta flights
Air CanadaPriceFrom $646Free CancellationRating
7.1
10,400 reviews
Search Air Canada 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
Aveiro
Matosinhos
Braga
Lamego
Guimarães
Esposende
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
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.

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