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Cheap Flights from Chicago (ORD) to Porto (OPO)

Compare Chicago O'Hare International to Porto flight deals

Find the cheapest month or even day of the year to fly to Porto

Book the best Porto fare with no extra fees

Flight deals from Chicago O'Hare International to Porto

Looking for a cheap last-minute deal or the best return flight from Chicago O'Hare International to Porto? Find the lowest prices on one-way and return tickets right here.
Porto.$719 per passenger.Departing Mon, 11 Aug, returning Sun, 24 Aug.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Mon, 11 Aug, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Sun, 24 Aug, arriving in Chicago O'Hare International.Price includes taxes and charges.From $719, select.
Porto.$765 per passenger.Departing Tue, 28 Oct, returning Tue, 4 Nov.Return flight with British Airways and Iberia.Outbound indirect flight with British Airways, departs from Chicago O'Hare International on Tue, 28 Oct, arriving in Porto.Inbound indirect flight with Iberia, departs from Porto on Tue, 4 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From $765, select.
Porto.$766 per passenger.Departing Wed, 19 Nov, returning Wed, 26 Nov.Return flight with British Airways and Iberia.Outbound indirect flight with British Airways, departs from Chicago O'Hare International on Wed, 19 Nov, arriving in Porto.Inbound indirect flight with Iberia, departs from Porto on Wed, 26 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From $766, select.
Porto.$768 per passenger.Departing Tue, 25 Nov, returning Tue, 2 Dec.Return flight with United and Lufthansa.Outbound indirect flight with United, departs from Chicago O'Hare International on Tue, 25 Nov, arriving in Porto.Inbound indirect flight with Lufthansa, departs from Porto on Tue, 2 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From $768, select.
Porto.$783 per passenger.Departing Wed, 22 Oct, returning Wed, 29 Oct.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Wed, 22 Oct, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Wed, 29 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From $783, select.
Porto.$785 per passenger.Departing Mon, 16 Feb, returning Mon, 23 Feb.Return flight with SWISS.Outbound indirect flight with SWISS, departs from Chicago O'Hare International on Mon, 16 Feb, arriving in Porto.Inbound indirect flight with SWISS, departs from Porto on Mon, 23 Feb, arriving in Chicago O'Hare International.Price includes taxes and charges.From $785, select.
Porto.$787 per passenger.Departing Mon, 11 Aug, returning Mon, 15 Sep.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Mon, 11 Aug, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Mon, 15 Sep, arriving in Chicago O'Hare International.Price includes taxes and charges.From $787, select.
Porto.$787 per passenger.Departing Mon, 8 Sep, returning Sun, 14 Sep.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Chicago O'Hare International on Mon, 8 Sep, arriving in Porto.Inbound indirect flight with TAP Air Portugal, departs from Porto on Sun, 14 Sep, arriving in Chicago O'Hare International.Price includes taxes and charges.From $787, select.

The cheapest month to fly from Chicago O'Hare International Airport to Porto Airport

We’re always keeping an eye on fares, to help you find the lowest one in seconds. Check out the Chicago O'Hare International Airport to Porto Airport flight prices forecast over the next 12 months.
Jun
from $1,656
Jul
from $1,026
Aug
from $719
Sep
from $787
Oct
from $783
Nov
from $766
Dec
from $1,662
Jan
Find prices
Feb
from $785
Mar
from $1,075
Apr
Find prices
May
from $1,014
Cheapest month:August
Most expensive month:December

Chicago O'Hare International to Porto: Alternative routes

Compare routes from Chicago O'Hare International to Porto below. You may find an airport to fly into that's cheaper, faster, or easier than Porto.

Chicago to Porto: Flight information

The things to know before you go.
Cheapest flight found$719
Cheapest month to flyAugust

Finding cheap flights from Chicago O'Hare International to Porto: Frequently asked questions

The best price we found for a return flight from Chicago O'Hare International to Porto is $719. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Chicago O'Hare International to Porto. But we found flights with one or more stops from $719.
As of June 2025, there are no flights flying from Chicago O'Hare International to Porto.
The cheapest month to fly from Chicago O'Hare International to Porto is usually June 2025.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Chicago O'Hare International Airport to Porto Airport on Monday, 11 August 2025.
No airlines currently offer direct flights between Chicago O'Hare International Airport and Porto Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Porto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Porto is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, TAP Air Portugal offers the cheapest flight tickets to Porto.

Flying from O'Hare International Airport (ORD) to Porto Airport (OPO): what you need to know

  • Porto is five hours ahead of Chicago and follows the UTC+0 timezone.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This will give you plenty of time to catch your ORD to OPO flight.

  • You'll likely experience longer queues in popular months like August. Arriving up to four hours in advance for international flights and two hours for domestic departures is a smart move.

  • If you want to include a stop along the way, just uncheck 'Direct flights only' when searching for your ticket from O'Hare International Airport to Porto Airport. These are the top stopovers between ORD and OPO:

    • Pearson International Airport

    • Newark Liberty International Airport

    • Logan International Airport

How to find the cheapest flights from O'Hare International Airport (ORD) to Porto Airport (OPO)

  • Right now, $418 is the cheapest price we've found for a one-way O'Hare International Airport to Porto Airport flight. The best price for a return ticket is $719. Bear in mind that fares may change due to availability at the time of booking.

  • It's a good idea to book ahead of time if you want to find cheap tickets from ORD to OPO. That's because airlines change prices based on demand, which tends to rise closer to departure.

  • If you can be flexible with your travel dates, use the 'Whole month' tool. It'll find the lowest price across each month when searching for a flight from O'Hare International Airport to Porto Airport.

  • Save time searching for cheap flights from ORD to OPO by creating a Price Alert. You'll receive an email or notification through the app when fares go down.

  • Choose your ideal arrival and departure times, number of stops and airlines with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from O'Hare International Airport to Porto Airport.

Handy information about O'Hare International Airport (ORD)

  • ORD's address is 10000 West O'Hare.

  • When it comes to the on-time performance of O'Hare International Airport, 74.85% of flights complete their journey on time.

  • Central Chicago to O'Hare International Airport is approximately 40 kilometres. Depending on traffic, it'll take about 35 minutes to get there if you're driving, catching a cab or ride-sharing.

  • The trip on public transport typically takes 55 minutes.

  • Get your break off to a relaxed start by staying near ORD. Whether you're taking an early flight from O'Hare International Airport to Porto Airport or just don't like being rushed, these hotels have you covered:

Arriving at Porto Airport (OPO)

  • The last thing you need is a lengthy journey to your hotel if you're getting in late on an O'Hare International Airport to Porto Airport flight. Stay at one of these accommodation options near OPO instead:

  • Pick up a Porto Airport rental car and explore Porto and beyond with your own set of wheels. Klass Wagen, Goldcar and Drive & Go are popular providers you can book with here.

  • For the best deal, book your vehicle from Porto Airport around three weeks before you set off.

Getting from Porto Airport (OPO) to central Porto

  • Porto Airport is roughly 16 kilometres from central Porto. Driving there takes about 20 minutes.

  • Travelling by public transport takes around 50 minutes.

When to fly to Porto Airport (OPO)

  • The quietest month for a flight from O'Hare International Airport to Porto Airport is January, while August is the busiest. Pick the ideal time to visit Porto based on whether you prefer a more fast-paced or easygoing experience.

  • Book your flight from O'Hare International Airport to Porto Airport for August if you want to go to Porto during its warmest month. You can expect temperatures of between 14ºC (57ºF) and 32ºC (90ºF).

  • If you want cooler conditions, look for a cheap ticket from ORD to OPO in January. Temperatures average between 3ºC (37ºF) and 14ºC (57ºF) then.

Explore more of Portugal

  • Porto has its own special appeal, but there are so many other parts of Portugal you should also see. Around 274 kilometres south of Porto, a trip to Lisbon will keep your itinerary busy. Start with popular sights like Torre de Belem Garden, Estrela At Lisbon - Tram 28 and Archaeological museum of Sao Jorge Castle.

  • Amadora is another standout destination in Portugal and is around 274 kilometres south of Porto. No trip is complete without seeing Jardim Porta do Viveiro Alfragide, Jardim Caracol do Victor Alfragide and Jardim e estatua Eduardo Jorge.

Plan the rest of your trip from Chicago to Porto

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.