HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Chicago (CHI) to Porto (OPO) from $375

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/3. 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.
CHI — OPO
May 1 — May 81
From?
To?
Wed 5/1
Wed 5/8
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

The best prices from Chicago to Porto are usually found in February or November, booked 87 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Chicago to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 26, 2024.

Popular in

June

Cheapest in

February

Average price

$584

Round-trip from

$523
High demand for flights, 23% potential price rise
Search Deals
Best time to find cheap flights, 25% potential price drop
Search Deals
Average for round-trip flights in April 2024
Search Deals
From Chicago (CHI) to Porto
Search Deals

What is the cheapest day to fly round-trip from Chicago to Porto?

Users have found that flying from Chicago to Porto on a Sunday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

What is the cheapest month to fly from Chicago to Porto?

Our data shows that February tends to be the cheapest month to fly to Porto from Chicago. Users have commonly found prices around $652 for the month, but tickets can be as low as $442. Due to multiple factors, prepare for potentially higher prices in June.

When is the cheapest time to fly from Chicago to Porto (CHI - OPO)?

A simple way to save on the total cost of your ticket is to fly from Chicago to Porto in the afternoon. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight at noon.

Cheap Iberia flights from Chicago to Porto

Explore cheap flight options specifically provided by Iberia for the route between Chicago and Porto. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
Take a peek at the cheapest Iberia flights we've detected traveling from Chicago to Porto. Deals update often to give you more flight options matching your criteria
Mon 5/134:35 pmORD - OPO
1 stop13h 10mIberia
Tue 5/218:35 pmOPO - ORD
2 stops22h 10mIberia
Deal found 4/24$595
Mon 5/134:35 pmORD - OPO
1 stop13h 10mIberia
Fri 5/248:15 amOPO - ORD
1 stop12h 05mIberia
Deal found 4/24$650
Mon 5/134:35 pmORD - OPO
1 stop17h 20mIberia
Tue 5/218:35 pmOPO - ORD
1 stop23h 45mIberia
Deal found 4/25$856
Mon 5/134:35 pmORD - OPO
1 stop13h 10mIberia
Mon 5/208:35 pmOPO - ORD
2 stops23h 10mIberia
Deal found 4/24$894
Sun 5/124:35 pmORD - OPO
1 stop13h 05mIberia
Tue 5/218:35 pmOPO - ORD
2 stops22h 10mIberia
Deal found 4/24$920
Mon 5/134:35 pmORD - OPO
1 stop13h 10mIberia
Wed 5/298:15 amOPO - ORD
1 stop12h 05mIberia
Deal found 4/25$925
Fri 5/104:35 pmORD - OPO
1 stop13h 05mIberia
Tue 5/218:35 pmOPO - ORD
2 stops22h 10mIberia
Deal found 4/24$970
Sun 5/124:35 pmORD - OPO
1 stop13h 05mIberia
Thu 5/238:15 amOPO - ORD
1 stop12h 05mIberia
Deal found 4/24$993
Fri 5/104:35 pmORD - OPO
1 stop13h 05mIberia
Fri 5/248:15 amOPO - ORD
1 stop12h 05mIberia
Deal found 4/24$1,043

Cheap American Airlines flights from Chicago to Porto

Explore cheap flight options specifically provided by American Airlines for the route between Chicago and Porto. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
Some of the lowest-priced American Airlines flights we've found at this time heading from Chicago to Porto. Ensure the flight price, dates, time, and airline match your criteria before you book.
Mon 5/135:35 pmORD - OPO
2 stops16h 20mAmerican Airlines
Tue 5/2112:25 pmOPO - ORD
2 stops28h 24mAmerican Airlines
Deal found 4/24$604
Tue 9/176:25 pmORD - OPO
2 stops31h 10mAmerican Airlines
Sat 10/58:15 amOPO - ORD
2 stops32h 30mAmerican Airlines
Deal found 4/25$840
Mon 9/166:30 amORD - OPO
2 stops19h 05mAmerican Airlines
Fri 9/278:15 amOPO - ORD
2 stops19h 14mAmerican Airlines
Deal found 4/25$904
Tue 5/1411:32 amORD - OPO
2 stops14h 03mAmerican Airlines
Tue 5/2112:25 pmOPO - ORD
2 stops25h 50mAmerican Airlines
Deal found 4/24$1,140

Cheap Chicago to Porto flights in April & May 2024

Find cheap flight options from Chicago to Porto specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Prices were last updated on April 26, 2024.
Scroll through some of the best deals on flights from Chicago to Porto in 2024. More deals are always being added, so be sure to check back regularly.
Mon 5/134:35 pmORD - OPO
1 stop13h 10mIberia
Tue 5/218:35 pmOPO - ORD
2 stops22h 10mIberia
Deal found 4/24$595
Mon 5/135:35 pmORD - OPO
2 stops16h 20mAmerican Airlines
Tue 5/2112:25 pmOPO - ORD
2 stops28h 24mAmerican Airlines
Deal found 4/24$604
Mon 5/134:35 pmORD - OPO
1 stop13h 10mIberia
Fri 5/248:15 amOPO - ORD
1 stop12h 05mIberia
Deal found 4/24$650
Thu 5/24:25 pmORD - OPO
1 stop23h 50mKLM
Thu 5/95:00 amOPO - ORD
1 stop15h 15mKLM
Deal found 4/25$657
Wed 5/18:45 amORD - OPO
2 stops19h 55mDelta
Thu 5/95:00 amOPO - ORD
1 stop15h 15mDelta
Deal found 4/25$662
Fri 5/108:20 amORD - OPO
1 stop19h 15mBritish Airways
Wed 5/228:05 pmOPO - ORD
1 stop23h 40mBritish Airways
Deal found 4/24$663
Fri 5/108:20 amORD - OPO
1 stop19h 15mBritish Airways
Wed 5/228:05 pmOPO - ORD
1 stop23h 40mBritish Airways
Deal found 4/25$664
Wed 5/18:45 amORD - OPO
2 stops19h 55mDelta
Wed 5/85:00 amOPO - ORD
2 stops20h 10mDelta
Deal found 4/25$672
Wed 5/17:15 pmORD - OPO
1 stop34h 00mSWISS
Thu 5/98:40 amOPO - ORD
1 stop13h 25mSWISS
Deal found 4/25$723

Chicago to Porto 2024 flight deals

Discover exclusive flight deals for travel between Chicago and Porto in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
Scroll through some of the best deals on flights from Chicago to Porto in 2024. More deals are always being added, so be sure to check back regularly.
Wed 11/65:20 pmORD - OPO
1 stop11h 30mDelta
Wed 12/115:00 amOPO - ORD
1 stop15h 30mDelta
Deal found 4/25$515
Wed 11/610:35 amORD - OPO
2 stops18h 15mDelta
Wed 12/115:00 amOPO - ORD
1 stop15h 30mDelta
Deal found 4/25$519
Fri 11/15:30 pmORD - OPO
1 stop20h 45mKLM
Sun 11/105:00 amOPO - ORD
1 stop15h 30mKLM
Deal found 4/26$528
Wed 11/61:35 pmORD - OPO
2 stops15h 15mDelta
Wed 12/115:00 amOPO - ORD
2 stops19h 40mDelta
Deal found 4/25$529
Sun 11/104:30 pmORD - OPO
1 stop23h 50mKLM
Tue 11/1911:45 amOPO - ORD
2 stops18h 14mKLM
Deal found 4/25$535
Fri 11/15:30 pmORD - OPO
1 stop20h 45mKLM
Sun 11/105:00 amOPO - ORD
1 stop15h 30mKLM
Deal found 4/25$561
Fri 11/15:30 pmORD - OPO
1 stop20h 45mKLM
Sun 11/105:00 amOPO - ORD
1 stop15h 30mKLM
Deal found 4/25$568
Wed 11/65:20 pmORD - OPO
1 stop11h 30mAir France
Thu 11/1411:45 amOPO - ORD
1 stop33h 25mAir France
Deal found 4/25$569
Fri 11/15:30 pmORD - OPO
1 stop20h 45mKLM
Sun 11/1011:45 amOPO - ORD
2 stops35h 57mKLM
Deal found 4/25$572

Chicago to Porto flights leaving soon

Find last-minute flight options from Chicago to Porto for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
Users seeking a last-minute flight from Chicago to Porto should consider booking one of these fares. To prevent any unwanted surprises, users should verify their flight info before booking.
Thu 5/24:25 pmORD - OPO
1 stop23h 50mKLM
Thu 5/95:00 amOPO - ORD
1 stop15h 15mKLM
Deal found 4/25$657
Wed 5/18:45 amORD - OPO
2 stops19h 55mDelta
Thu 5/95:00 amOPO - ORD
1 stop15h 15mDelta
Deal found 4/25$662
Wed 5/18:45 amORD - OPO
2 stops19h 55mDelta
Thu 5/95:00 amOPO - ORD
2 stops17h 33mDelta
Deal found 4/25$672
Wed 5/17:15 pmORD - OPO
1 stop34h 00mSWISS
Thu 5/98:40 amOPO - ORD
1 stop13h 25mSWISS
Deal found 4/25$723
Sun 5/55:15 pmORD - OPO
1 stop16h 15mDelta
Wed 5/1511:25 amOPO - ORD
1 stop32h 50mDelta
Deal found 4/25$735
Fri 5/34:20 pmORD - OPO
1 stop23h 55mKLM
Fri 5/175:00 amOPO - ORD
1 stop15h 20mKLM
Deal found 4/25$737
Sun 5/55:25 pmORD - OPO
2 stops16h 05mDelta
Thu 5/165:00 amOPO - ORD
1 stop15h 15mDelta
Deal found 4/25$739
Fri 5/34:20 pmORD - OPO
1 stop23h 55mKLM
Fri 5/179:15 amOPO - ORD
2 stops17h 40mKLM
Deal found 4/25$741
Sun 5/55:15 pmORD - OPO
1 stop16h 15mAir France
Fri 5/179:15 amOPO - ORD
2 stops17h 40mAir France
Deal found 4/25$742

One-way flights to Porto from Chicago

Search for one-way flight options from Chicago to Porto. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
Users traveling one-way from Chicago to Porto can select one of these great deals. For those needing a return trip from Chicago, there is a search form available above.
Mon 6/36:10 amORD - OPO
3 stops43h 50mMultiple Airlines
Deal found 4/25$375
Wed 6/59:15 pmORD - OPO
2 stops39h 55mMultiple Airlines
Deal found 4/25$411
Tue 6/49:57 amORD - OPO
3 stops40h 03mMultiple Airlines
Deal found 4/25$426
Fri 9/271:13 pmMDW - OPO
2 stops19h 12mMultiple Airlines
Deal found 4/25$430
Fri 10/411:05 amMDW - OPO
2 stops18h 35mMultiple Airlines
Deal found 4/25$445
Fri 10/45:15 pmMDW - OPO
1 stop12h 30mMultiple Airlines
Deal found 4/25$449
Wed 6/58:27 amMDW - OPO
3 stops28h 33mMultiple Airlines
Deal found 4/25$456
Mon 6/36:10 amORD - OPO
2 stops35h 20mMultiple Airlines
Deal found 4/25$479
Wed 6/56:40 pmORD - OPO
3 stops30h 20mMultiple Airlines
Deal found 4/25$486

Find flights from Chicago to Porto within your budget

Customize your flight search to find flights from Chicago to Porto 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, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$595 - $869

Route

Depart

Return

Price

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 5/13

1 stop13h 10m

Porto

Tue 5/21

2 stops22h 10m

$595

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 5/13

2 stops16h 20m

Porto

Tue 5/21

2 stops28h 24m

$604

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Tue 9/17

1 stop16h 15m

Porto

Sat 10/5

1 stop13h 45m

$626

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Fri 5/10

1 stop19h 15m

Porto

Wed 5/22

1 stop23h 40m

$663

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sat 9/14

1 stop12h 15m

Porto

Sun 9/22

1 stop24h 05m

$737

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 5/5

1 stop16h 15m

Porto

Fri 5/17

2 stops17h 40m

$742

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Thu 9/12

2 stops46h 20m

Porto

Thu 9/26

2 stops35h 35m

$797

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Mon 5/13

2 stops23h 25m

Porto

Thu 5/23

1 stop18h 00m

$799

Chicago O'Hare IntlPorto

ORD - OPO

ORDOPO

Chicago O'Hare Intl

Sun 5/5

1 stop10h 55m

Porto

Tue 5/14

1 stop24h 00m

$869

Flights are sorted by cheapest first

Deals found on 4/24

When is the best time to book a flight from Chicago to Porto?

Use this chart to determine the optimal time to book a round-trip flight from Chicago to Porto. Price data was last updated on January 28, 2024.
The price you pay for your flight from Chicago to Porto may vary depending on when you book. For the best chance of a lower fare, look to book 87 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly from Chicago to Porto?

Use this chart to determine the cheapest time to fly round-trip from Chicago to Porto. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Chicago to Porto flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Porto by month

Plan your trip from Chicago to Porto by taking into account the cheapest months to travel. The average price of a one-way flight from Chicago to Porto is currently $440 while a round-trip flight costs $715. Price data was last updated on April 21, 2024.

Currently, January is the cheapest month in which you can book a flight from Chicago to Porto (average of $523). Flying from Chicago to Porto in June is currently the most expensive (average of $1,027). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$523

February

$581

March

$599

April

$742

May

$888

June

$1,027

July

$980

August

$869

September

$760

October

$694

November

$554

December

$643

Temperature and rainfall in Porto by month

Plan your trip to Porto by taking into account the average temperature and rainfall totals by month.

OPO

Temperature

48.2 - 68 °F

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated April 26, 2024.
Read through reviews of airlines operating flights from Chicago to Porto, such as Iberia, American Airlines and British Airways. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,975 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Food

7.4

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
10,975 reviews
Delta
8.1
Very good
10,975 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Food

7.4

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

KLM
7.9
Good
1,628 reviews
Delta
8.1
Very good
10,975 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Food

7.4

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

SWISS
7.8
Good
2,062 reviews
Delta
8.1
Very good
10,975 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Food

7.4

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Air France
7.6
Good
1,809 reviews
Delta
8.1
Very good
10,975 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Food

7.4

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

United Airlines
7.4
Good
11,226 reviews
Delta
8.1
Very good
10,975 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Overall

8.1

Food

7.4

Boarding

8.2

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from Chicago?

    Porto (OPO), located 6.8 mi from the city center, is the airport you fly into when you book flights from Chicago to Porto. 9 airlines have flights to Porto from Chicago on a regular basis. Booking flights from Chicago to Porto should not be difficult; the airport handles an average of 0 inbound flights from Chicago per day.

  • Can I find flights from Chicago to Porto for under $600 on Cheapflights?

    Yes, there are multiple flights from Chicago to Porto for under $600. The cheapest flight booked recently is on Iberia for just $595, but on average you can expect to pay $704.

  • Are there last-minute flights available from Chicago to Porto for under $700?

    There are currently 20+ open flights from Chicago to Porto within the next 7 days for less than $700.

  • What are the cheapest airlines flying from Chicago to Porto round-trip?

    Iberia, at $595, was found to be the cheapest airline from Chicago to Porto.Alternate airlines to your destination round-trip include American Airlines and Delta. Iberia is 8% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most popular airlines that fly from Chicago to Porto?

    When booking a flight from Chicago to Porto, you may want to consider flying on American Airlines, British Airways or Delta as they are the most popular for this route.

  • What does ORD to OPO mean?

    ORD and OPO are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. ORD to OPO refers to a flight route from Chicago O'Hare Intl Airport to Porto Airport. Chicago Midway Airport (MDW), Chicago Greater Rockford Airport (RFD) are other airports near this flight route and their unique identifiers/IATA codes.

  • Can I find deals for flights from Chicago to Porto that include extra baggage allowance?

    The amount of baggage you can bring on your Chicago to Porto flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Chicago to Porto with specific airlines?

    Yes, Cheapflights allows you to browse and filter Chicago to Porto flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Chicago to Porto that include hotel bookings?

    Yes. In addition to deals on Chicago to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Porto.

  • Can I find deals for business class flights from Chicago to Porto?

    Yes. Cheapflights offers flight deals from Chicago to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Chicago to Porto that allow pets onboard?

    Many airlines flying from Chicago to Porto offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Chicago to Porto?

    Yes, you can often find last-minute deals on Chicago to Porto flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Chicago to Porto flight deals updated?

    The Chicago to Porto flight deals you see on this page were last updated on 4/26.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Chicago to Porto
See prices for flight routes from nearby airports that may be better suited for you.

O'Hare Intl to Lisbon flights
Midway to Lisbon flights
O'Hare Intl to Porto flights
St. Louis to Lisbon flights
Midway to Porto flights
O'Hare Intl to Ponta Delgada flights
O'Hare Intl to Funchal flights
O'Hare Intl to Faro flights
St. Louis to Porto flights
O'Hare Intl to Lajes flights
Champaign to Lisbon flights
Midway to Faro flights
St. Louis to Lajes flights
Peoria to Lisbon flights
Springfield to Lisbon flights
Bloomington to Lisbon flights

Top 9 airlines flying from Chicago to Porto

Discover the top 9 airlines that operate flights from Chicago to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,068,117 searches. Data last updated April 26, 2024.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$433Average$726FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IberiaCheapest$484Average$619FlexibilityNo cancel feeOn-time77%
Search Iberia flights
TAP AIR PORTUGALCheapest$490Average$852FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
KLMCheapest$520Average$802FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest$520Average$801FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
British AirwaysCheapest$524Average$692FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest$530Average$798FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$619Average$1,118FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest$640Average$1,234FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Austin to Nashville flights
Orlando to Charlotte flights
Miami to Los Angeles flights
Newark Airport to San Diego flights
Newark Airport to New Delhi flights
USA to Mumbai flights
USA to Kathmandu flights
USA to Ireland flights
Denver to Dallas flights
San Jose to Los Angeles flights
Austin to Chicago flights
Chicago to Norfolk flights

Search flights from Chicago to Porto by cabin class

Find flights from Chicago to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Perugia Sant Egidio
Flights to Biarritz Parme
Flights to Argostoli Cephalonia
Flights to Melilla
Flights to Milas–Bodrum
Flights to Girona Costa Brava
Flights to Fez Sais
Flights to Zakynthos Dionsios Salomos
Flights to Bourgas
Flights to Bodø
Flights to Reggio Calabria Tito Menniti
Flights to Bastia Poretta
Flights to Skiathos
Flights to Kalamata
Flights to Batumi
Flights to Menorca/Mahon
Flights to Kristiansand Kjevik
Flights to Champaign University-Willard
Flights to Kagoshima
Flights to Ohrid
Flights to Clermont-Ferrand Aulnat
Flights to Parikia Paros
Flights to Lanzhou Arpt
Flights to Mason City

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Chicago to Porto?

Cheapflights helps you search for flights from Chicago to Porto via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Chicago to Porto?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Chicago to Porto for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Chicago to Porto with no change fees?

Yes, we can. To see specific flights from Chicago to Porto with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Chicago to Porto become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines