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Cheap flights from Chicago to Portugal from $217

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 Portugal departing on 10/8. 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

Scandinavian Airlines Logo
7:20 pm - 4:45 pmORD-OPO
15h 25m1 stop
Scandinavian Airlines Logo
5:45 pm - 4:45 pmOPO-ORD
29h 00m1 stop
$395Scandinavian Airlines
Find Deal
Sun, Nov 16 - Fri, Dec 5
Scandinavian Airlines Logo
7:20 pm - 1:45 pmORD-FNC
36h 25m2 stops
Scandinavian Airlines Logo
4:10 pm - 4:45 pmFNC-ORD
30h 35m1 stop
$439Scandinavian Airlines
Find Deal
Thu, Jan 1 - Sat, Feb 28
TAP AIR PORTUGAL Logo
6:10 pm - 7:00 pmORD-OPO
18h 50m1 stop
TAP AIR PORTUGAL Logo
9:15 pm - 12:35 pmOPO-ORD
21h 20m1 stop
$476TAP AIR PORTUGAL
Find Deal
Mon, Sep 22 - Wed, Oct 8
United Airlines Logo
2:30 pm - 9:30 amORD-OPO
13h 00m1 stop
United Airlines Logo
6:00 am - 1:10 pmOPO-ORD
13h 10m1 stop
$485United Airlines
Find Deal
Mon, Nov 17 - Tue, Dec 9
TAP AIR PORTUGAL Logo
6:10 pm - 10:25 amORD-FAO
10h 15m1 stop
TAP AIR PORTUGAL Logo
6:15 pm - 4:10 pmFAO-ORD
27h 55m1 stop
$487TAP AIR PORTUGAL
Find Deal
Mon, Sep 22 - Tue, Sep 30
United Airlines Logo
1:00 pm - 9:30 amORD-OPO
14h 30m2 stops
United Airlines Logo
12:30 pm - 8:05 pmOPO-ORD
13h 35m1 stop
$489United Airlines
Find Deal
Mon, Nov 17 - Fri, Dec 5
Air Canada Logo
3:55 pm - 11:15 amORD-OPO
37h 20m2 stops
Air Canada Logo
6:00 am - 1:01 pmOPO-ORD
37h 01m2 stops
$513Air Canada
Find Deal
Sun, Nov 16 - Tue, Dec 9
Air Canada Logo
3:35 pm - 9:20 amORD-LIS
11h 45m1 stop
Air Canada Logo
5:00 am - 4:52 pmLIS-ORD
17h 52m2 stops
$541Air Canada
Find Deal
Thu, Nov 13 - Tue, Nov 25
British Airways Logo
10:45 pm - 2:15 pmORD-FNC
34h 30m1 stop
British Airways Logo
12:25 pm - 1:50 pmFNC-ORD
31h 25m1 stop
$551British Airways
Find Deal
Sun, Oct 26 - Mon, Nov 10
British Airways Logo
10:45 pm - 2:15 pmORD-FNC
34h 30m1 stop
British Airways Logo
12:50 pm - 6:45 pmFNC-ORD
35h 55m1 stop
$604British Airways
Find Deal
Sun, Oct 26 - Sun, Nov 9

TAP AIR PORTUGAL flights from Chicago to Portugal

Our best TAP AIR PORTUGAL deals on Chicago to Portugal flight tickets
TAP AIR PORTUGAL
Sep 22
ORD6:10 pmChicago O'Hare Intl
18h 50m
1 stop
OPO7:00 pmPorto
Oct 8
OPO9:15 pmPorto
21h 20m
1 stop
ORD12:35 pmChicago O'Hare Intl
$476
Find similar
TAP AIR PORTUGAL
Sep 29
ORD6:10 pmChicago O'Hare Intl
22h 45m
1 stop
OPO10:55 pmPorto
Oct 15
OPO9:15 pmPorto
21h 20m
1 stop
ORD12:35 pmChicago O'Hare Intl
$487
Find similar
TAP AIR PORTUGAL
Sep 29
ORD6:10 pmChicago O'Hare Intl
18h 50m
1 stop
OPO7:00 pmPorto
Oct 15
OPO10:00 amPorto
32h 35m
1 stop
ORD12:35 pmChicago O'Hare Intl
$494
Find similar

Aer Lingus flights from Chicago to Portugal

Our best Aer Lingus deals on Chicago to Portugal flight tickets
Aer Lingus
Aug 26
ORD9:15 pmChicago O'Hare Intl
18h 20m
1 stop
LIS9:35 pmLisbon Humberto Delgado
Sep 16
LIS10:15 pmLisbon Humberto Delgado
21h 45m
1 stop
ORD2:00 pmChicago O'Hare Intl
$868
Find similar
Aer Lingus
Aug 26
ORD9:15 pmChicago O'Hare Intl
18h 20m
1 stop
LIS9:35 pmLisbon Humberto Delgado
Sep 16
LIS10:15 pmLisbon Humberto Delgado
21h 45m
1 stop
ORD2:00 pmChicago O'Hare Intl
$885
Find similar
Aer Lingus
Aug 30
ORD3:45 pmChicago O'Hare Intl
12h 30m
1 stop
LIS10:15 amLisbon Humberto Delgado
Sep 12
LIS10:15 pmLisbon Humberto Delgado
21h 45m
1 stop
ORD2:00 pmChicago O'Hare Intl
$1,036
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago to Portugal 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 21, 2025.
Use the filters below to find and compare flights from Chicago to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/16

7:20 pm-4:45 pm

1 stop15h 25m

Porto

Fri 12/5

5:45 pm-4:45 pm

1 stop29h 00m

$395

ChicagoFunchal

ORD - FNC

ORDFNC

Chicago O'Hare Intl

Thu 1/1

7:20 pm-1:45 pm

2 stops36h 25m

Funchal Madeira

Sat 2/28

4:10 pm-4:45 pm

1 stop30h 35m

$439

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 9/22

6:10 pm-7:00 pm

1 stop18h 50m

Porto

Wed 10/8

9:15 pm-12:35 pm

1 stop21h 20m

$476

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/17

2:30 pm-9:30 am

1 stop13h 00m

Porto

Tue 12/9

6:00 am-1:10 pm

1 stop13h 10m

$485

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Mon 9/22

6:10 pm-10:25 am

1 stop10h 15m

Faro

Tue 9/30

6:15 pm-4:10 pm

1 stop27h 55m

$487

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 11/17

1:00 pm-9:30 am

2 stops14h 30m

Porto

Fri 12/5

12:30 pm-8:05 pm

1 stop13h 35m

$489

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 11/16

3:55 pm-11:15 am

2 stops37h 20m

Porto

Tue 12/9

6:00 am-1:01 pm

2 stops37h 01m

$513

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Thu 11/13

3:35 pm-9:20 am

1 stop11h 45m

Lisbon Humberto Delgado

Tue 11/25

5:00 am-4:52 pm

2 stops17h 52m

$541

ChicagoFunchal

ORD - FNC

ORDFNC

Chicago O'Hare Intl

Sun 10/26

10:45 pm-2:15 pm

1 stop34h 30m

Funchal Madeira

Mon 11/10

12:25 pm-1:50 pm

1 stop31h 25m

$551

ChicagoFunchal

ORD - FNC

ORDFNC

Chicago O'Hare Intl

Sun 10/26

10:45 pm-2:15 pm

1 stop34h 30m

Funchal Madeira

Sun 11/9

12:50 pm-6:45 pm

1 stop35h 55m

$604

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 Portugal from

How to get the cheapest flight ticket from Chicago to Portugal

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 Portugal?

The cheapest month to fly to Portugal from Chicago is in February. Flight prices, which tend to average around $558, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Chicago during January instead. Flights to Portugal in January, while not as cheap as those in February, still average around $588.

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

According to our data, Wednesday is the cheapest day to fly to Portugal from Chicago. The lowest ticket price found for a Wednesday departure recently was $584. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Saturday, with ticket prices averaging around $820.

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

Our most recent data shows that the best time of day to fly to Portugal is in the evening. Flights from Chicago to Portugal during this time can be as low as $552. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $815 per ticket.

What is the cheapest Chicago to Portugal flight route?

Fly from Chicago O'Hare Intl to Lisbon Humberto Delgado for the best Chicago - Portugal flight prices

How far in advance should I book a flight to Portugal?

You are more likely to see cheaper flights to Portugal from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $752 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Chicago for as low as $731 on momondo.

What cabin class options are available on Chicago to Portugal flights?

There are 3 cabin classes available to choose from on Chicago to Portugal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Chicago to Portugal flights?

You could potentially save up to 21% on your flight if you consider stops on a Chicago to Portugal flight.

Cheap Chicago to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Portugal

Best Price Found

$235

Fastest flight time

7h 55m

Direct flights

Mon, Tue, Thu, Fri, Sat and Sun

Airports in Portugal

1 airport
The best one-way flight to Portugal from Chicago in the past 72 hours is $235. The best round-trip flight deal from Chicago to Portugal found on momondo in the last 72 hours is $389.
The fastest flight from Chicago to Portugal takes 7h 55m
Direct flights go from Chicago to Portugal on Monday, Tuesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport near Portugal: Lisbon Humberto Delgado (LIS)
Search flight deals

  • When did momondo last update prices for flights from Chicago to Portugal?

    Prices for flights from Chicago to Portugal refresh daily.

  • How many operators does momondo search for flights from Chicago to Portugal?

  • How old do you have to be to fly from Chicago to Portugal?

    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 Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The required travel and health documents for your Portugal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Chicago to Portugal?

Best airlines flying from Chicago to Portugal

Compare and see reviews for airlines that fly from Chicago to Portugal with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $411Free CancellationRating
7.4
1,471 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $444Free CancellationRating
7.0
529 reviews
Search Icelandair flights
FinnairPriceFrom $463Free CancellationRating
7.6
1,320 reviews
Search Finnair flights
TAP AIR PORTUGALPriceFrom $464Free CancellationRating
7.1
1,959 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $474Free CancellationRating
7.0
2,884 reviews
Search Iberia flights
Virgin AtlanticPriceFrom $490Free CancellationRating
7.4
658 reviews
Search Virgin Atlantic flights
Aer LingusPriceFrom $494Free CancellationRating
7.1
1,228 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $504Free CancellationRating
6.7
7,291 reviews
Search British Airways flights
American AirlinesPriceFrom $511Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SWISSPriceFrom $517Free CancellationRating
7.6
1,702 reviews
Search SWISS flights

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Portugal?

Finding the right flight to Portugal from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Portugal quick and easy, saving you time and money.

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

All flight searches from Chicago to Portugal on momondo can be filtered to show those which offer flexible booking policies.

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

momondo helps you find the best flight between Chicago and Portugal by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Chicago and alert you when they change.

An easier way to manage your Portugal 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.
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Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
Flights to Lisbonfrom $359
Flights to Portofrom $340
Flights to Funchalfrom $346
Flights to Farofrom $357
Flights to Ponta Delgadafrom $450
Flights to Lajesfrom $504
Flights to Hortafrom $584
Flights to Pico Islandfrom $585
Flights to Porto Santofrom $440
Flights to Velasfrom $584