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Cheap flights from Chicago O'Hare Intl Airport to Portugal from $249

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 Portugal departing on 11/16. 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 O'Hare Intl Airport to Portugal

Cheap round-trip flights

United Airlines Logo
12:45 pm - 9:30 amORD-OPO
15h 45m2 stops
United Airlines Logo
12:35 pm - 8:07 pmOPO-ORD
13h 32m1 stop
$410United Airlines
Find Deal
Mon, Oct 27 - Wed, Nov 12
United Airlines Logo
4:20 pm - 9:30 amORD-OPO
12h 10m1 stop
United Airlines Logo
12:35 pm - 8:07 pmOPO-ORD
13h 32m1 stop
$414United Airlines
Find Deal
Mon, Oct 27 - Wed, Nov 12
American Airlines Logo
5:45 pm - 4:00 pmORD-OPO
17h 15m1 stop
American Airlines Logo
8:20 am - 2:30 pmOPO-ORD
12h 10m1 stop
$446American Airlines
Find Deal
Mon, Oct 27 - Wed, Nov 12
TAP AIR PORTUGAL Logo
8:10 pm - 9:55 amORD-OPO
32h 45m1 stop
TAP AIR PORTUGAL Logo
8:55 am - 2:45 pmOPO-ORD
11h 50m1 stop
$483TAP AIR PORTUGAL
Find Deal
Wed, Oct 29 - Sun, Nov 9
TAP AIR PORTUGAL Logo
8:15 pm - 7:00 pmORD-OPO
16h 45m1 stop
TAP AIR PORTUGAL Logo
6:55 am - 3:45 pmOPO-ORD
13h 50m1 stop
$488TAP AIR PORTUGAL
Find Deal
Fri, Mar 6 - Sun, Mar 15
British Airways Logo
6:10 pm - 4:05 pmORD-FNC
16h 55m1 stop
British Airways Logo
4:55 pm - 1:50 pmFNC-ORD
26h 55m1 stop
$503British Airways
Find Deal
Sun, Oct 26 - Mon, Nov 3
Air Canada Logo
3:35 pm - 11:40 amORD-OPO
38h 05m2 stops
Air Canada Logo
6:00 am - 3:10 pmOPO-ORD
39h 10m2 stops
$506Air Canada
Find Deal
Sat, Nov 15 - Thu, Nov 27
American Airlines Logo
4:55 pm - 8:50 amORD-LIS
9h 55m1 stop
American Airlines Logo
7:05 am - 3:25 pmLIS-ORD
14h 20m1 stop
$520American Airlines
Find Deal
Fri, Dec 5 - Fri, Dec 12
British Airways Logo
4:45 pm - 8:00 pmORD-OPO
21h 15m1 stop
British Airways Logo
8:40 pm - 3:30 pmOPO-ORD
23h 50m1 stop
$525British Airways
Find Deal
Fri, Mar 6 - Mon, Mar 16
Air Canada Logo
8:15 pm - 9:20 amORD-LIS
31h 05m1 stop
Air Canada Logo
10:55 am - 8:05 amLIS-ORD
27h 10m2 stops
$538Air Canada
Find Deal
Sun, Dec 14 - Thu, Dec 25

United Airlines flights from Chicago O'Hare Intl Airport to Portugal

Our best United Airlines deals on Chicago O'Hare Intl Airport to Portugal flight tickets
United Airlines
Oct 27
ORD12:45 pmChicago O'Hare Intl
15h 45m
2 stops
OPO9:30 amPorto
Nov 12
OPO12:35 pmPorto
13h 32m
1 stop
ORD8:07 pmChicago O'Hare Intl
$410
Find similar
United Airlines
Oct 27
ORD4:20 pmChicago O'Hare Intl
12h 10m
1 stop
OPO9:30 amPorto
Nov 12
OPO12:35 pmPorto
13h 32m
1 stop
ORD8:07 pmChicago O'Hare Intl
$414
Find similar
United Airlines
Oct 27
ORD12:00 pmChicago O'Hare Intl
16h 30m
1 stop
OPO9:30 amPorto
Nov 12
OPO12:35 pmPorto
17h 08m
2 stops
ORD11:43 pmChicago O'Hare Intl
$436
Find similar

Air Canada flights from Chicago O'Hare Intl Airport to Portugal

Our best Air Canada deals on Chicago O'Hare Intl Airport to Portugal flight tickets
Air Canada
Nov 15
ORD3:35 pmChicago O'Hare Intl
38h 05m
2 stops
OPO11:40 amPorto
Nov 27
OPO6:00 amPorto
39h 10m
2 stops
ORD3:10 pmChicago O'Hare Intl
$506
Find similar
Air Canada
Dec 14
ORD8:15 pmChicago O'Hare Intl
31h 05m
1 stop
LIS9:20 amLisbon Humberto Delgado
Dec 25
LIS10:55 amLisbon Humberto Delgado
27h 10m
2 stops
ORD8:05 amChicago O'Hare Intl
$538
Find similar
Air Canada
Oct 27
ORD4:50 pmChicago O'Hare Intl
11h 30m
1 stop
LIS9:20 amLisbon Humberto Delgado
Nov 8
LIS5:00 amLisbon Humberto Delgado
20h 30m
2 stops
ORD7:30 pmChicago O'Hare Intl
$548
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 16, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport 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

12:45 pm-9:30 am

2 stops15h 45m

Porto

Wed 11/12

12:35 pm-8:07 pm

1 stop13h 32m

$410

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 10/27

4:20 pm-9:30 am

1 stop12h 10m

Porto

Wed 11/12

12:35 pm-8:07 pm

1 stop13h 32m

$414

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 10/27

5:45 pm-4:00 pm

1 stop17h 15m

Porto

Wed 11/12

8:20 am-2:30 pm

1 stop12h 10m

$446

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Wed 10/29

8:10 pm-9:55 am

1 stop32h 45m

Porto

Sun 11/9

8:55 am-2:45 pm

1 stop11h 50m

$483

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 3/6

8:15 pm-7:00 pm

1 stop16h 45m

Porto

Sun 3/15

6:55 am-3:45 pm

1 stop13h 50m

$488

ChicagoFunchal

ORD - FNC

ORDFNC

Chicago O'Hare Intl

Sun 10/26

6:10 pm-4:05 pm

1 stop16h 55m

Funchal Madeira

Mon 11/3

4:55 pm-1:50 pm

1 stop26h 55m

$503

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 11/15

3:35 pm-11:40 am

2 stops38h 05m

Porto

Thu 11/27

6:00 am-3:10 pm

2 stops39h 10m

$506

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Fri 12/5

4:55 pm-8:50 am

1 stop9h 55m

Lisbon Humberto Delgado

Fri 12/12

7:05 am-3:25 pm

1 stop14h 20m

$520

ChicagoPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 3/6

4:45 pm-8:00 pm

1 stop21h 15m

Porto

Mon 3/16

8:40 pm-3:30 pm

1 stop23h 50m

$525

ChicagoLisbon

ORD - LIS

ORDLIS

Chicago O'Hare Intl

Sun 12/14

8:15 pm-9:20 am

1 stop31h 05m

Lisbon Humberto Delgado

Thu 12/25

10:55 am-8:05 am

2 stops27h 10m

$538

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 O'Hare Intl Airport 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 O'Hare Intl Airport is in January. Flight prices, which tend to average around $548, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Portugal from Chicago O'Hare Intl Airport during February instead. Flights to Portugal in February, while not as cheap as those in January, still average around $565.

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 O'Hare Intl Airport. The lowest ticket price found for a Wednesday departure recently was $586. 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 $817.

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 O'Hare Intl Airport to Portugal during this time can be as low as $561. In the afternoon is when there is more demand to fly to Portugal, so prices are often more expensive at around $810 per ticket.

What is the cheapest Chicago O'Hare Intl to Portugal flight route?

Fly from Chicago O'Hare Intl to Lisbon Humberto Delgado for the best Chicago O'Hare Intl - 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 O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $750 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Chicago O'Hare Intl Airport for as low as $722 on momondo.

What cabin class options are available on Chicago O'Hare Intl to Portugal flights?

There are 3 cabin classes available to choose from on Chicago O'Hare Intl 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 O'Hare Intl Airport to Portugal flights?

You could potentially save up to 23% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Portugal flight.

Cheap Chicago O'Hare Intl Airport to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Portugal

Best Price Found

$263

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 O'Hare Intl Airport in the past 72 hours is $263. The best round-trip flight deal from Chicago O'Hare Intl Airport to Portugal found on momondo in the last 72 hours is $510.
The fastest flight from Chicago O'Hare Intl Airport to Portugal takes 7h 55m
Direct flights go from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Portugal?

    Prices for flights from Chicago O'Hare Intl Airport to Portugal are updated daily.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Portugal?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Portugal.

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

    The travel and health documents you'll need for your trip to Portugal 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 Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Chicago O'Hare Intl Airport to Portugal?

Best airlines flying from Chicago O'Hare Intl Airport to Portugal

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Portugal with momondo
Airline
Rating
Free Cancellation
Price
Scandinavian AirlinesPriceFrom $369Free CancellationRating
7.4
1,486 reviews
Search Scandinavian Airlines flights
IcelandairPriceFrom $444Free CancellationRating
7.0
544 reviews
Search Icelandair flights
TAP AIR PORTUGALPriceFrom $453Free CancellationRating
7.1
1,975 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $472Free CancellationRating
7.0
2,924 reviews
Search Iberia flights
Aer LingusPriceFrom $484Free CancellationRating
7.2
1,274 reviews
Search Aer Lingus flights
Virgin AtlanticPriceFrom $490Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $504Free CancellationRating
6.7
7,363 reviews
Search British Airways flights
American AirlinesPriceFrom $510Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SWISSPriceFrom $517Free CancellationRating
7.6
1,737 reviews
Search SWISS flights
KLMPriceFrom $525Free CancellationRating
7.8
1,386 reviews
Search KLM flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Portugal. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Portugal from Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Chicago to Portugal flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

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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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