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Cheap flights from Chicago to Portugal from $224

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 10/15. 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 to Portugal

Cheap round-trip flights

United Airlines Logo
2:22 pm - 9:30 amORD-OPO
14h 08m1 stop
United Airlines Logo
12:35 pm - 11:43 pmOPO-ORD
17h 08m2 stops
$434United Airlines
Find Deal
Mon, Oct 27 - Wed, Nov 12
Logo
7:15 am - 11:15 amORD-OPO
22h 00m2 stops
Logo
12:05 pm - 4:20 pmOPO-ORD
34h 15m1 stop
$435
Find Deal
Tue, Nov 25 - Tue, Dec 2
TAP AIR PORTUGAL Logo
7:10 pm - 1:05 pmORD-OPO
11h 55m1 stop
TAP AIR PORTUGAL Logo
5:00 am - 3:00 pmOPO-ORD
16h 00m1 stop
$476TAP AIR PORTUGAL
Find Deal
Wed, Nov 5 - Sun, Nov 16
TAP AIR PORTUGAL Logo
8:10 pm - 7:45 amORD-OPO
30h 35m1 stop
TAP AIR PORTUGAL Logo
8:55 am - 3:00 pmOPO-ORD
12h 05m1 stop
$483TAP AIR PORTUGAL
Find Deal
Wed, Oct 29 - Sun, Nov 9
Air Canada Logo
12:50 pm - 12:05 pmORD-OPO
17h 15m2 stops
Air Canada Logo
6:00 am - 10:05 pmOPO-ORD
22h 05m2 stops
$488Air Canada
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Tue, Nov 25 - Tue, Dec 2
British Airways Logo
6:10 pm - 4:05 pmORD-FNC
16h 55m1 stop
British Airways Logo
5:10 pm - 6:45 pmFNC-ORD
31h 35m1 stop
$491British Airways
Find Deal
Sun, Oct 26 - Thu, Nov 6
British Airways Logo
5:10 pm - 4:05 pmORD-FNC
16h 55m1 stop
British Airways Logo
5:10 pm - 6:45 pmFNC-ORD
31h 35m1 stop
$493British Airways
Find Deal
Sun, Nov 23 - Thu, Dec 4
American Airlines Logo
10:11 am - 7:35 amORD-OPO
15h 24m2 stops
American Airlines Logo
8:15 am - 2:15 pmOPO-ORD
12h 00m1 stop
$506American Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
Air Canada Logo
3:55 pm - 1:20 pmORD-LIS
15h 25m2 stops
Air Canada Logo
11:20 am - 8:00 amLIS-ORD
26h 40m2 stops
$527Air Canada
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Wed, Dec 3 - Fri, Dec 12
American Airlines Logo
5:45 pm - 2:45 pmORD-FAO
15h 00m2 stops
American Airlines Logo
8:00 pm - 2:00 pmFAO-ORD
24h 00m2 stops
$907American Airlines
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Mon, Oct 6 - Wed, Oct 15

Delta flights from Chicago to Portugal

Our best Delta deals on Chicago to Portugal flight tickets
Delta
Nov 25
ORD5:20 pmChicago O'Hare Intl
11h 10m
1 stop
OPO10:30 amPorto
Dec 2
OPO6:05 amPorto
21h 41m
2 stops
ORD9:46 pmChicago O'Hare Intl
$475
Find similar
Delta
Nov 17
MDW1:47 pmChicago Midway
14h 28m
2 stops
OPO10:15 amPorto
Nov 25
OPO11:10 amPorto
18h 22m
2 stops
MDW11:32 pmChicago Midway
$478
Find similar
Delta
Nov 26
ORD11:14 amChicago O'Hare Intl
17h 16m
2 stops
OPO10:30 amPorto
Dec 2
OPO6:05 amPorto
21h 41m
2 stops
ORD9:46 pmChicago O'Hare Intl
$479
Find similar

British Airways flights from Chicago to Portugal

Our best British Airways deals on Chicago to Portugal flight tickets
British Airways
Oct 26
ORD6:10 pmChicago O'Hare Intl
16h 55m
1 stop
FNC4:05 pmFunchal Madeira
Nov 6
FNC5:10 pmFunchal Madeira
31h 35m
1 stop
ORD6:45 pmChicago O'Hare Intl
$491
Find similar
British Airways
Nov 23
ORD5:10 pmChicago O'Hare Intl
16h 55m
1 stop
FNC4:05 pmFunchal Madeira
Dec 4
FNC5:10 pmFunchal Madeira
31h 35m
1 stop
ORD6:45 pmChicago O'Hare Intl
$493
Find similar
British Airways
Oct 30
ORD10:45 pmChicago O'Hare Intl
31h 35m
1 stop
FNC11:20 amFunchal Madeira
Nov 10
FNC4:55 pmFunchal Madeira
26h 55m
1 stop
ORD1:50 pmChicago O'Hare Intl
$544
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 September 11, 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

Mon 10/27

2:22 pm-9:30 am

1 stop14h 08m

Porto

Wed 11/12

12:35 pm-11:43 pm

2 stops17h 08m

$434

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 11/25

7:15 am-11:15 am

2 stops22h 00m

Porto

Tue 12/2

12:05 pm-4:20 pm

1 stop34h 15m

$435

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 11/5

7:10 pm-1:05 pm

1 stop11h 55m

Porto

Sun 11/16

5:00 am-3:00 pm

1 stop16h 00m

$476

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/29

8:10 pm-7:45 am

1 stop30h 35m

Porto

Sun 11/9

8:55 am-3:00 pm

1 stop12h 05m

$483

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 11/25

12:50 pm-12:05 pm

2 stops17h 15m

Porto

Tue 12/2

6:00 am-10:05 pm

2 stops22h 05m

$488

ChicagoFunchal

ORD - FNC

ORDFNC

Chicago O'Hare Intl

Sun 10/26

6:10 pm-4:05 pm

1 stop16h 55m

Funchal Madeira

Thu 11/6

5:10 pm-6:45 pm

1 stop31h 35m

$491

ChicagoFunchal

ORD - FNC

ORDFNC

Chicago O'Hare Intl

Sun 11/23

5:10 pm-4:05 pm

1 stop16h 55m

Funchal Madeira

Thu 12/4

5:10 pm-6:45 pm

1 stop31h 35m

$493

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/15

10:11 am-7:35 am

2 stops15h 24m

Porto

Wed 10/22

8:15 am-2:15 pm

1 stop12h 00m

$506

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Wed 12/3

3:55 pm-1:20 pm

2 stops15h 25m

Lisbon Humberto Delgado

Fri 12/12

11:20 am-8:00 am

2 stops26h 40m

$527

ChicagoFaro

ORD - FAO

ORDFAO

Chicago O'Hare Intl

Mon 10/6

5:45 pm-2:45 pm

2 stops15h 00m

Faro

Wed 10/15

8:00 pm-2:00 pm

2 stops24h 00m

$907

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 $557, 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 $589.

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 $585. 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 $823.

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 $557. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $813 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

$256

Fastest flight time

7h 55m

Direct flights

Mon, Tue, Thu, Sat and Sun

Airports in Portugal

1 airport
The best one-way flight to Portugal from Chicago in the past 72 hours is $256. The best round-trip flight deal from Chicago to Portugal found on momondo in the last 72 hours is $519.
The fastest flight from Chicago to Portugal takes 7h 55m
Direct flights go from Chicago to Portugal on Monday, Tuesday, Thursday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport near Portugal: Lisbon Humberto Delgado (LIS)
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  • 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 $369Free CancellationRating
7.4
1,484 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $444Free CancellationRating
7.0
546 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $453Free CancellationRating
7.1
1,977 reviews
Search TAP AIR PORTUGAL flights
FinnairPriceFrom $463Free CancellationRating
7.6
1,323 reviews
Search Finnair flights
IberiaPriceFrom $472Free CancellationRating
7.0
2,929 reviews
Search Iberia flights
Aer LingusPriceFrom $484Free CancellationRating
7.2
1,271 reviews
Search Aer Lingus flights
Virgin AtlanticPriceFrom $490Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $504Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
American AirlinesPriceFrom $510Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SWISSPriceFrom $517Free CancellationRating
7.5
1,731 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

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Popular flights according to clicks in the last 7 days on momondo
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