$128 Cheap Flights from Reykjavik (KEF) to Porto (OPO)

View $128 flight on Tue, Oct 14, 2025Opens in a new window

Popular airlines from Reykjavik–Keflavik Intl. Airport (KEF) to Porto Airport (OPO)

Cheap Flights from Reykjavik to Porto (KEF-OPO)

Prices were available within the past 7 days and start at $128 for one-way flights and $227 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Fly Play
Thu, Oct 9 - Thu, Oct 16
KEF
Reykjavik
OPO
Porto
$227 Roundtrip, found 7 hours ago
$227
Roundtrip
found 7 hours ago
Select Fly Play flight, departing Thu, Oct 9 from Reykjavik to Porto, returning Thu, Oct 16, priced at $227 found 7 hours ago
Norwegian Air Shuttle
Tue, Oct 14 - Tue, Oct 21
KEF
Reykjavik
OPO
Porto
$249 Roundtrip, found 1 day ago
$249
Roundtrip
found 1 day ago
Select Norwegian Air Shuttle flight, departing Tue, Oct 14 from Reykjavik to Porto, returning Tue, Oct 21, priced at $249 found 1 day ago
Fly Play
Sun, Sep 21 - Thu, Oct 2
KEF
Reykjavik
OPO
Porto
$265 Roundtrip, found 21 hours ago
$265
Roundtrip
found 21 hours ago
Select Fly Play flight, departing Sun, Sep 21 from Reykjavik to Porto, returning Thu, Oct 2, priced at $265 found 21 hours ago
Lufthansa
Sat, Nov 15 - Sat, Nov 22
KEF
Reykjavik
OPO
Porto
$273 Roundtrip, found 7 hours ago
$273
Roundtrip
found 7 hours ago
Select Lufthansa flight, departing Sat, Nov 15 from Reykjavik to Porto, returning Sat, Nov 22, priced at $273 found 7 hours ago
Swiss International Air Lines
Tue, Oct 14 - Tue, Oct 21
KEF
Reykjavik
OPO
Porto
$276 Roundtrip, found 1 day ago
$276
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Tue, Oct 14 from Reykjavik to Porto, returning Tue, Oct 21, priced at $276 found 1 day ago
Lufthansa
Sat, Dec 6 - Sat, Dec 13
KEF
Reykjavik
OPO
Porto
$287 Roundtrip, found 2 days ago
$287
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Sat, Dec 6 from Reykjavik to Porto, returning Sat, Dec 13, priced at $287 found 2 days ago
Swiss International Air Lines
Tue, Oct 14 - Tue, Oct 21
KEF
Reykjavik
OPO
Porto
$291 Roundtrip, found 1 day ago
$291
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Tue, Oct 14 from Reykjavik to Porto, returning Tue, Oct 21, priced at $291 found 1 day ago
Swiss International Air Lines
Tue, Oct 14 - Tue, Oct 21
KEF
Reykjavik
OPO
Porto
$298 Roundtrip, found 1 day ago
$298
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Tue, Oct 14 from Reykjavik to Porto, returning Tue, Oct 21, priced at $298 found 1 day ago
Swiss International Air Lines
Tue, Oct 14 - Mon, Oct 20
KEF
Reykjavik
OPO
Porto
$299 Roundtrip, found 1 day ago
$299
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Tue, Oct 14 from Reykjavik to Porto, returning Mon, Oct 20, priced at $299 found 1 day ago
World Ticket Ltd
Thu, Oct 9 - Thu, Oct 16
KEF
Reykjavik
OPO
Porto
$320 Roundtrip, found 7 hours ago
$320
Roundtrip
found 7 hours ago
Select World Ticket Ltd flight, departing Thu, Oct 9 from Reykjavik to Porto, returning Thu, Oct 16, priced at $320 found 7 hours ago
Flights from Reykjavik (KEF) to Porto (OPO)
Origin airport
Keflavik Intl.
Destination airport
Dr. Francisco de Sa Carneiro
Airlines serving
Austrian Airlines, British Airways, Fly Play, KLM, Lufthansa, Norwegian Air Shuttle, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, World Ticket Ltd
Roundtrip price
$226
Distance
1669 mi

Reykjavik to Porto Flights

The cheapest times to fly from Reykjavik to Porto

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Reykjavik to Porto are during the month of October. You can find some of the cheapest flights from Reykjavik to Porto with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Reykjavik to Porto

Sunday is one of the best days to book for cheap flights from Reykjavik to Porto: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Reykjavik to Porto

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Reykjavik to Porto in 2025. You can also book with separate airlines for your outbound and return journeys, from $128 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Reykjavik to Porto flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Reykjavik to Porto airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO) cost?
Grab a cheap one-way flight from $128 or cheap return flight from $227 from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Planning your getaway for October can help you save, as it's the cheapest month for flights between KEF and OPO. You'll often find the lowest fares during off-peak months.
What is the cheapest airline that flies from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO)?
To find the cheapest airline that'll fly you from KEF to OPO, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and number of stops. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO)?
You'll need to take a flight with a layover if you're traveling from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from KEF to OPO?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change based on a range of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO)?
Book a flight from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO) that takes off before 3 PM to reduce the risk of cancellations. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO) last-minute?
Booking your flight from KEF to OPO right before your trip is generally more expensive. However, if there's some wiggle room with your departure times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a KEF to OPO flight and hotel package?
Compared with arranging flights and hotels separately, booking a KEF to OPO flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one convenient place will take the hassle out of travel planning. Simply pick your flights and choose from our wide range of stays, then tailor your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Keflavik Intl. Airport (KEF) to Dr. Francisco de Sa Carneiro Airport (OPO)?
If you booked your KEF to OPO flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

Explore a world of travel with Expedia

*Available to One Key members.