$302 Find Cheap Flights from Chicago to Porto - Compare and Save

Four cabin classes are available on flights from Chicago O'Hare Intl Airport to Porto:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

A nonstop flight from Chicago O'Hare Intl Airport to Porto takes 00m, covering 3,931 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Round-trip flights from Chicago O'Hare Intl Airport to Porto range from $659 to $1,010, with an average of $848 over the past 12 months. Anything below $659 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 43% above the $848 route average. Book 18 weeks before departure for the lowest fares.

One-way fares from Chicago O'Hare Intl Airport to Porto are currently lower than usual. Average one-way flight prices are about $411, which is 25% below the typical average for this route.

Porto Airport (OPO) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include:

• GREEN MOTION
• Drive on Holiday
• Klass Wagen
• Goldcar Rental SP
• Sixt

Flights from Chicago O'Hare Intl Airport to Porto usually depart from Chicago O'Hare Intl (ORD) and arrive at Porto (OPO).

One-stop flights from Chicago O'Hare Intl Airport to Porto most commonly connect through:

• Lisbon Humberto Delgado (LIS) - 57% of one-stop connections
• Frankfurt am Main (FRA) - 11% of one-stop connections
• Madrid Barajas (MAD) - 10% of one-stop connections
• Istanbul (IST) - 7% of one-stop connections

Yes. Flexible dates can save you up to 25% on flights from Chicago O'Hare Intl Airport to Porto. Monday is the cheapest departure day at $780 round-trip on average, while Saturday is the most expensive at $1,039, a difference of $259.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Flying via Madrid Barajas (MAD) gives the shortest average 1-stop total travel time at 12h 25m, compared with 12h 25m via New York John F Kennedy Intl (JFK) and 12h 32m via Newark (EWR).

Porto is 6 hours ahead of Chicago O'Hare Intl Airport (Western European Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Porto are Ribeira Square, Avenida dos Aliados and Mercado do Bolhão. These are among the most viewed places in Porto on KAYAK.

The airport offers free-of-charge luggage trolleys within the airport. Go to the landside to get your baggage wrapped to protect it from damages. Do you require a storage area for your bags as you tour the airport? Porto Airport has a storage room and lockers on the landside, 3rd floor of Departure level, available for you to store your bags. To acquire a storage room, you have to pay a fee of around €2 (2$2.04) to €7 ($7.16), depending on your luggage weight. The locker rooms are on the ground floor of the landside and go for roughly a minimum of €2 ($2.04).

Porto Airport has baby care rooms that are fully equipped on the landside and airside. If your child is about 15kg or less, the airport provides free-of-charge baby strollers that you can use within the airport premise. The pick-up station for the baby strollers is on the 2nd floor of the airside. The strollers are only allowed in the post-security areas.

Regardless of the part of Porto that you would like to visit from the airport, there is always a bus in the bus system that fits your destination needs. If you want a car rental instead, there is a level Zero at the terminal where the service is accessible. You can opt for taxi services at the Arrivals area to access the town from the airport.

ORD provides wheelchairs at the airport to passengers with mobility impairment. The airport also has TSA cares program that helps passengers with special needs in the process of security screening. You can also access all the airport restrooms as they are all wheelchair accessible. I designed the service animal relief area to be accessed by the pet and the owner. Chicago Airport has equipped all terminal elevators with Braille and raised numerals to allow all passengers access and use.