C$530 Cheap Flights from Porto (OPO) to Chicago (CHIA)

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Flight deals from Porto Airport to Chicago

Looking for a cheap last-minute deal or the best return flight from Porto Airport to Chicago? If you want to travel next month, return fares start from C$1,071. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Porto to Chicago

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Porto to Chicago flights are currently cheapest in April.

Porto to Chicago: Flight information

The things to know before you go.
Cheapest flight foundC$530
Cheapest month to flyApril

Finding cheap flights from Porto to Chicago: Frequently asked questions

There are 4 airports in Chicago: Chicago Midway, Chicago O'Hare International, Chicago Dupage County, and Chicago Rockford.
The best price we found for a return flight from Porto to Chicago is C$916. 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 Porto to Chicago. But we found flights with one or more stops from C$916.
As of April 2026, there are no flights flying from Porto to Chicago.
The cheapest month to fly from Porto to Chicago is usually April.
If you're flying from Porto Airport, the cheapest airport near Chicago is Chicago O'Hare International – which is 25.4 km away from the centre of Chicago. We've found flights into this airport from C$916.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Porto Airport to Chicago on Wednesday, April 15, 2026.
No airlines currently offer direct flights between Porto Airport and Chicago. 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 Chicago 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 Chicago is around 40 days in advance, so don’t leave your flight to the last minute.
In April, the average temperature is usually around 8°C. July is typically the warmest month in Chicago, when it usually averages around 26°C. You can expect the least rain in January. The coldest month is January, with temperatures averaging -8°C. The rainiest month is August.
Currently, TAP Air Portugal offers the cheapest flight tickets to Chicago.

Travelling from Porto Airport (OPO) to Chicago: what you need to know

  • The timezone in Chicago is UTC-5. The city is 5 hours behind Porto, where Porto Airport is located.

  • For hassle-free travel, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This way, you can comfortably board your flight from OPO to Chicago.

  • During popular months such as August, it's a good idea to get to the airport earlier. Arrive two hours before a domestic departure and four hours ahead for an international flight whenever you're travelling during high season in general.

  • Stopovers are the perfect opportunity to take a break from travelling — and perhaps even explore another city. When browsing flights from OPO to Chicago, uncheck the 'Direct flights only' box to see where you can stop along the way. Consider one of these popular options:

    • Logan International Airport (BOS)

    • Pearson International Airport (YYZ)

    • Newark Liberty International Airport (EWR)

  • If you hold a passport from Portugal, you will need an ETA to visit United States. This applies when booking a cheap ticket from Porto Airport to Chicago for tourism purposes. Requirements may change if you're travelling for work or other reasons. Always consult official visa guidelines before you make travel plans and definitely before you fly.

  • The journey from central Porto to OPO takes about 49 minutes on public transport. If you ride-share, drive or get a cab, you'll cover the 16 kilometres in 21 minutes or so, depending on traffic conditions.

  • Need a handy hotel near OPO? If you've booked an early flight from Porto Airport to Chicago, these accommodation options will have you moments from check-in:

How to find the cheapest flights from Porto Airport (OPO) to Chicago

  • The lowest price we've found for a one-way ticket from Porto Airport to Chicago is C$530. The cheapest price for a return flight is C$916. Keep in mind fares can change due to demand at the time of booking.

  • Don't leave things to the last minute. You're more likely to find cheap tickets from OPO to Chicago if you book ahead. Airlines often offer some fantastic early bird discounts.

  • The 'Whole month' search function shows you the cheapest tickets from Porto Airport to Chicago across each month. It's an easy way to find a bargain if your plans aren't set in stone.

  • Sign into your online account or use the app to set up a Price Alert. You'll be notified right away if there's a better deal on this route. It doesn't take long, and it'll save you the hassle of looking for cheap tickets from OPO to Chicago every day.

  • Tailor your travel plans with filters. Choose your ideal arrival and departure times, total journey duration and airlines. You can also sort results by 'Best,' 'Cheapest' or 'Fastest' flights from Porto Airport to Chicago.

Airports in Chicago

O'Hare International Airport (ORD)

Chicago Midway International Airport (MDW)

Best time to go to Chicago

  • August is the most popular month for flights from Porto Airport to Chicago. To skip the crowds, head to Chicago in February when things are quieter.

  • Lock in your flight from Porto Airport to Chicago for July to experience the city during its warmest month. You can expect temperatures to range from 15ºC to 29ºC.

  • If you want cooler conditions, lock in a cheap flight from OPO to Chicago in January when temperatures average between -12ºC and 3ºC.

More about Chicago

  • Start your Chicago trip right by choosing the ideal place to stay. After booking your flight from Porto Airport to Chicago, explore our selection of accommodation options including:

  • Every great journey has to include a little sightseeing. Millennium Park, Art Institute of Chicago and LandShark Beer Garden at Navy Pier are attractions you won't want to skip in Chicago.

Complete your Chicago trip with a car rental

  • Finding you a cheap flight from Porto Airport to Chicago isn't the only trick up our sleeve. Check out our car rentals in Chicago and have more freedom to explore. We find deals from trusted car rental providers and put them all in one place. You can instantly compare offers and then book with no fees.

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