$256 Find Cheap Flights from Chicago to Portugal - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Portugal departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Cheap Flights from Chicago to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon1 stop$857
Porto
Porto1 stop$601
Faro
Faro2 stops$749
Funchal
Funchal2 stops$660
Ponta Delgada
Ponta Delgada1 stop$761
Lajes
Lajes1 stop$790
Lisbon
Lisbon1 stop$857
Porto
Porto1 stop$601
Faro
Faro2 stops$749
Funchal
Funchal2 stops$660
Ponta Delgada
Ponta Delgada1 stop$761
Lajes
Lajes1 stop$790

Book Cheap Chicago to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago to Portugal that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Chicago to Portugal

Wed, Oct 28 - Sat, Oct 31
Scandinavian Airlines Logo
8:15 pm - 5:00 pm
ORD
-
OPO
15h 45m
1 stop
Scandinavian Airlines Logo
12:00 pm - 5:45 pm
OPO
-
ORD
34h 45m
1 stop
$601Scandinavian Airlines
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
7:25 pm - 8:00 am
ORD
-
OPO
30h 35m
3 stops
Multiple Airlines Logo
10:25 pm - 6:15 pm
OPO
-
ORD
25h 50m
2 stops
$623Multiple Airlines
Sun, Sep 20 - Tue, Oct 6
TAP AIR PORTUGAL Logo
6:00 pm - 5:00 pm
ORD
-
OPO
17h 00m
1 stop
TAP AIR PORTUGAL Logo
9:15 pm - 4:00 pm
OPO
-
ORD
24h 45m
1 stop
$631TAP AIR PORTUGAL
Sun, Sep 20 - Thu, Oct 1
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
7:00 am - 12:40 pm
OPO
-
ORD
11h 40m
1 stop
$632TAP AIR PORTUGAL
Wed, Sep 23 - Wed, Oct 7
TAP AIR PORTUGAL Logo
6:00 pm - 3:00 pm
ORD
-
OPO
15h 00m
1 stop
TAP AIR PORTUGAL Logo
5:05 am - 4:00 pm
OPO
-
ORD
16h 55m
1 stop
$633TAP AIR PORTUGAL
Mon, Aug 17 - Wed, Aug 26
Air Canada Logo
8:40 pm - 8:20 am
ORD
-
PDL
30h 40m
1 stop
Air Canada Logo
9:35 am - 2:55 pm
PDL
-
ORD
10h 20m
1 stop
$785Air Canada
Mon, Aug 17 - Wed, Aug 26
Air Canada Logo
3:40 pm - 8:20 am
ORD
-
PDL
35h 40m
2 stops
Air Canada Logo
9:35 am - 2:55 pm
PDL
-
ORD
10h 20m
1 stop
$791Air Canada
Mon, Aug 17 - Wed, Aug 26
United Airlines Logo
3:00 pm - 8:40 am
ORD
-
PDL
12h 40m
2 stops
United Airlines Logo
11:00 am - 9:30 pm
PDL
-
ORD
15h 30m
2 stops
$798United Airlines
Mon, Aug 17 - Wed, Aug 26
United Airlines Logo
12:16 pm - 8:40 am
ORD
-
PDL
15h 24m
1 stop
United Airlines Logo
11:00 am - 11:22 pm
PDL
-
ORD
17h 22m
1 stop
$806United Airlines
Thu, Aug 13 - Fri, Aug 21
Aer Lingus Logo
9:00 pm - 9:35 pm
ORD
-
LIS
18h 35m
1 stop
Aer Lingus Logo
10:15 pm - 2:00 pm
LIS
-
ORD
21h 45m
1 stop
$865Aer Lingus
Booking Insights

KAYAK's insights & trends for Chicago to Portugal flights

Get data-powered insights and trends into flights from Chicago to Portugal to help you find the cheapest flights, the best time to fly and much more.

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

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Portugal from Chicago O'Hare Intl Airport found in the last 5 days was to Lisbon, at $575 round-trip. The most popular route is from Chicago O'Hare Intl Airport (ORD) to Lisbon (LIS), and the cheapest round-trip airline ticket found on this route in the last 5 days was $575.

What is the cheapest time of day to fly to Portugal?

The average price for all round-trip flights from Chicago O'Hare Intl Airport to Portugal depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Portugal is generally at night, when round-trip flights cost $588 on average. Morning departures are around 100% cheaper than evening flights, on average. The most expensive time of day to fly to Portugal is generally in the evening, which is peak travel time and where the average cost of a ticket is $784.

Can I save money by flying with a layover from Chicago O'Hare Intl Airport to Portugal?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $886 on average.

What is the cheapest month to fly from Chicago O'Hare Intl Airport to Portugal?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Chicago O'Hare Intl Airport to Portugal, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Chicago O'Hare Intl Airport to Portugal is August, when tickets cost $300 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $676 and $586 respectively.

What’s the cheapest day of the week to fly from Chicago to Portugal?

The average price of all round-trip flights from Chicago O'Hare Intl Airport to Portugal clicked on KAYAK for each day over the last 12 months.

When flying from Chicago to Portugal, you should consider leaving on a Wednesday and avoid Thursdays if you are looking for the best rates. For your return to Chicago, you’ll find the best rates on Thursdays and the most expensive ones on Fridays.

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Portugal?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Chicago O'Hare Intl Airport to Portugal, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Chicago O'Hare Intl Airport to Portugal, you should book around 4 weeks before departure, which saves you about 18% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$256
Best time to beat the crowds with an average 39% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Chicago O'Hare Airport to Lisbon

FAQs - booking Portugal flights

  • How does KAYAK find such low prices on flights from Chicago to Portugal?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to Portugal.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Chicago to Portugal is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago to Portugal?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Chicago to Portugal with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to Portugal?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Chicago to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many flights are there between Chicago O'Hare Intl Airport and Portugal per day?

    There is a maximum of 1 nonstop flight a day that takes off from Chicago O'Hare Intl Airport and lands in Portugal, with an average flight time of 8h 10m. The most common departure time is 4:00 pm and most flights take off in the afternoon. Each week, there are 5 flights.

Reviews of the top 5 airlines serving from Chicago to Portugal

 
Need help choosing which airline to fly with from Chicago to Portugal? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9940 reviews
8.1Crew
7.7Boarding
7.1Entertainment
7.3Comfort
6.6Food
Airline reviews

The kid in the middle seat kicked me almost the whole flight, almost kicked my hot tea off my tray. The flight was delayed due to the first plane not being able to be de-iced in July! We had to get a new plane. Now I drive 3 hours back to Edmonton because direct flights from PVR were way to expensive

2.0 MediocreAnonymous, Jul 2026
ORD - YYC
Read more United Airlines reviews

The kid in the middle seat kicked me almost the whole flight, almost kicked my hot tea off my tray. The flight was delayed due to the first plane not being able to be de-iced in July! We had to get a new plane. Now I drive 3 hours back to Edmonton because direct flights from PVR were way to expensive

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Know that the movies that you are going to be offered are the oldest be rated movies they could possibly get. They may have one or two new movies that they keep advertising but when you’re flying 15 hours, there is nothing to see past the first new movie.

Agents at gate were not immediately available to solve problems and once they did they didn’t fix all the fight connections

Great experience. Boarding was fast, staff were very nice and funny, everything at the seat worked well.

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

Smooth travel. Immediate update prior flight delay so I can arrange myself properly without too rush.

Boarded early; and arrived home 40 mins early. After a long flight, it’s nice to be back home early. These flights have no amenities; no snacks. So need to bring your own

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

OK overall. Flight was delayed Crew on flight was good

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

I flew economy class. Seats were very good and the crew was excellent

Fast and sensible boarding was absolutely amazing. But extortionate wifi and seats that barely moved, making me unable to sleep, didn't do a lot of favors.

Excellent flight and crew. Boarding at Dublin Airport was a very difficult trying to find the right gate.

I appteciate the very courteous staff. The flight was good. Something that wasn't good was that my bag was only checked as far as Dublin and I had a connecting flight to Vienna. (That was a mistake the ORD desk made.) Fortunately the desk at DUB was able to re-tag without me having to re-check in (which initially it seemed I might have to do.)

Delightful flight, ahead of time with a super crew, thanks

It was excellent! The plane left Chicago early. Arrived in Dublin early. The crew was excellent! It was a great experience.

Horrible. Garbage airline. Due to the strike we got a replacement plane/crew. I didn't get my exit row seat I paid for. Food was horrible. Plane was hot and didn't have AC vents.

Are Longus was fine. I booked thru Kayak and was unable to get my business class seat early. Sat next to galley. Crew forgot to wake me for breakfast.

Not have my bag forced to be checked when I had a carry on included on my ticket. Staff was very rude to me for asking why they were doing this. I was told there was no more room for carry ons but there was plenty of space in the overhead compartments

The crew was excellent. What I did not enjoy was the food. I have taken many international flights and this was on the low end. Otherwise the trip was fine.

Seats were the most uncomfortable seats i ever experienced on a flight to Europe from Boston. It was a waist of money in buying premium seats for top dollars. I want my money back for what i paid extra for my seats. Awful conditions!

Boarding felt a little chaotic as everyone was waiting around the gate. Food was great, service was good.

Flight attendants in business class were rather indifferent While in second leg operated by Portugalia TAP subsidiary were outstanfy

The chicken was so dry it was impossible to eat. No substitute was offered. The port to charge my phone was broken and all I got was a shrug from the crew. The entertainment system was glitchy and subtitles didn’t load. Crew seemed fully uninterested and unfriendly.

The flight crew were absolute rock stars. When they came to the gate they looked like royalty, so chic. They also were extremely kind. Food was good and I loved the lack of plastic waste. The flight was lovely and smooth.

We were unable to check in due to technical problems on TAP’s end. The flight was delayed forty minutes with no reason given. We received timely notice of the flight delay. We were also notified of a gate change. The new gate was at a different terminal. When we got to the new terminal, we learned that we had to go back to the old terminal first to check in. This information should have been included along with the gate change notification. Also unexplained, the steward skipped us when offering breakfast.

Horrible experience at tbe check in ladie she was very racist ,she doesn't speak portuguese too and forced me to check in my carrion bag and I saw everyone with carrion bag inside anda lot of space ,she was rude unprofessional

Absolutely unacceptable level of service for a Business class: lousy drink and food options, disgusting food (inedible meat, watery rice, etc...), pathetic level of attentiveness from staff, Business class restrooms were not accessible for long periods because blocked of by staff...overall extremely disappointing, will NEVER fly Business on TAP again.

I'm 6'8" (2.03m) so more legroom would alwqys be appreciated, especially on long international flights. The food choices were underwhelming.

Didn’t make it on the flight. Delayed then had to be rebooked, which in turn had me waiting at the airport for another 8 hours before next flight

the check-in lady at ORD was extremely rude and unprofessional. very disappointed as it was supposed to be a celebration for my wife's birthday and it really put a damper on things. if i wanted to be treated like trash, i would have flown Economy! (as opposed to business class)

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Very bad, flight was cancelled due to strike and staff was unable to rebook us

Flight was delayed by 1.5hrs. Once inside, people had their small handbags on the storage. The crew (male guy) was not helpful in making some space in the storage. Instead, he asked few bags to be checked-in and it was not a great experience. No attempt to help but just followed the things with a straight face. People had their literally small bags and he wouldnt not move from one storage to another even if there was space and would not let us do i as well. Once flight was on, they ran out of Orange juice, really running out of orange juice when the temp were 32.degrees outside. didnt made the sense. Onasking for a extra snack, he made a face as if he was giving me out of his pocket. if the flight was delayed, there could have an attempt to provide something extra incase people did asked.

Abandoned me in hallway in a wheelchair… which I asked for because I sprained my back. After waiting in the hallway, I decided to walk the rest of the way since someone respecting me up.. My experience with the united was totally the opposite. Wheelchair access, propped swift and save me a lot of grief. Air Canada totally disorganized.

Terrible confusion btw air Canada and United. Wasn’t able to change ticket because I had purchased on kayak. Rethinking booking tickets on this site, and will try to avoid United and aircanada going forward.

Conflicting information provided about baggage allowance. One screen said I had a carry on and another said I didnt.

It's hard to tell where to plug in electronics, and the port on my seat didn't work. Their entertainment system was down. Vegetarian food options were tasty. Friendly, helpful flight attendants.

Lady next to me was coughing profusely the entire flight, other lady moved seats because of it, 8 hours of that during an overnight flight is a bit much.

The seats are extra cramped if you are taller than 5’8! Spring for the extra legroom seats for sure if you have a long flight!

Very disappointed with British Airways. It has been over 24 hours and I still have not received my checked baggage or any proper update. Customer support has been unresponsive, making the situation even more frustrating. Poor baggage handling and lack of communication seriously impacted my travel experience.

Cancelled flight and re booked seats were a downgrade. British Airways said the upgrade was t available but when I checked it was but then they wouldn’t make it right

Overall ok. Best part has always been the sundae dessert.

Very good staff members with sincere passion and responsibility in their job.

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Had a nice little suite although I couldn’t close the door (but I didn’t ask anyone to help). 5K is a nice seat and very private (you look in on first class). Enjoyable flight and nice crew.

The plane was known to be late in advance of takeoff. My guess is that it was known to be late at 11am or 5 hours before scheduled takeoff time. We were late to leave and with a wheelchair and the a cart, we only made it to gate. We raced! Inside plane, all was great

Everything you need to know for your flight from Chicago to Portugal

Information on your arrival and departure airports