Cheap Flights from Louisville Muhammad Ali International to Porto

Compare Louisville Muhammad Ali International to Porto flight deals

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

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Flight deals from Louisville Muhammad Ali International to Porto

Looking for a cheap last-minute deal or the best return flight from Louisville Muhammad Ali International Airport to Porto Airport? If you want to travel next month, return fares start from R 19,360. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Louisville Muhammad Ali International to Porto

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

Louisville Muhammad Ali International to Porto: Alternative routes

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

Louisville to Porto: Flight information

The things to know before you go.
Cheapest flight foundR 5,408
Cheapest month to flyNovember

Finding cheap flights from Louisville Muhammad Ali International to Porto: Frequently asked questions

The best price we found for a return flight from Louisville Muhammad Ali International to Porto is R 13,746. 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 Louisville Muhammad Ali International to Porto. But we found flights with one or more stops from R 13,746.
As of May 2026, there are no flights flying from Louisville Muhammad Ali International to Porto.
The cheapest month to fly from Louisville Muhammad Ali International to Porto is usually October.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Louisville Muhammad Ali International Airport to Porto Airport on Friday, 16 October 2026.
No airlines currently offer direct flights between Louisville Muhammad Ali 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, Delta offers the cheapest flight tickets to Porto.

Travelling from Louisville International Airport-Standiford Field (SDF) to Porto Airport (OPO): what you need to know

  • The timezone in Porto is UTC+0, which is four hours ahead of Louisville.

  • Leave enough time to catch your SDF to OPO flight. As a general rule, turn up two hours before international departures and an hour ahead for domestic flights.

  • You'll likely experience longer queues during popular months such as July. Arriving up to four hours in advance for an international flight and two hours for a domestic departure will give you ample time for security and boarding.

  • If you want to tour a new city along the way, search for a flight with a stopover. To see all your options for tickets from Louisville International Airport-Standiford Field to Porto Airport, deselect 'Direct flights only.' Newark Liberty International Airport is a sought-after stop between SDF and OPO.

How to find the cheapest flights from Louisville International Airport-Standiford Field (SDF) to Porto Airport (OPO)

  • The lowest price we've seen for a one-way Louisville International Airport-Standiford Field to Porto Airport flight is R 5,408. A round-trip ticket is currently R 13,746. Depending on the availability when you book, these fares could change.

  • To pick up cheap tickets from SDF to OPO, book ahead. Airlines tend to offer the most competitive fares when flights are first made available.

  • If you can be flexible with your trip dates, try using the 'Whole month' search function. It'll show you the cheapest price across the month when searching for a flight from Louisville International Airport-Standiford Field to Porto Airport.

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

  • Discover the right flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from Louisville International Airport-Standiford Field to Porto Airport, use the 'Sort by' function. You can also filter by departure and arrival times, airline, and number of stops.

Handy information about Louisville International Airport-Standiford Field (SDF)

  • You'll find SDF at 600 Terminal Drive.

  • When it comes to the on-time performance of Louisville International Airport-Standiford Field, data shows 77.69% of flights stick to their scheduled arrival time.

  • To get to Louisville International Airport-Standiford Field from central Louisville, it'll take around 25 minutes by car. Of course, this depends on traffic. It's approximately 23 kilometres from the airport to the city centre.

  • The trip on public transport will take about 2 hours 40 minutes.

  • Need a handy hotel near SDF? If you're catching an early flight from Louisville International Airport-Standiford Field to Porto Airport, these accommodation options will have you sleeping moments from your departure gate:

Arriving at Porto Airport (OPO)

  • The last thing you need is a long trip to your hotel if you're getting in late on a Louisville International Airport-Standiford Field to Porto Airport flight. Stay at one of these accommodation options near OPO instead:

  • Go where the road takes you with a Porto Airport rental car. Pick up a set of wheels from Klass Wagen, Goldcar or Drive & Go and discover more of Porto and beyond.

  • Secure the lowest price by reserving your vehicle from Porto Airport around three weeks in advance of your trip.

Getting from Porto Airport (OPO) to central Porto

  • Porto Airport to the centre of Porto has a drive time of around 20 minutes. It's approximately 16 kilometres away.

  • It takes roughly 50 minutes to get there using public transport.

When to fly to Porto Airport (OPO)

  • August is the busiest month for flights from Louisville International Airport-Standiford Field to Porto Airport. To steer clear of the crowds, head to Porto in January.

  • When reserving your flight from Louisville International Airport-Standiford Field to Porto Airport, think about the kind of weather you like. August is the warmest month in Porto, with temperatures ranging from 14ºC (57ºF) to 32ºC (90ºF).

  • For cooler conditions, search for a cheap ticket from SDF to OPO in January. Temperatures average between 3ºC (37ºF) and 14ºC (57ºF) then.

Explore more of Portugal

  • You've seen Porto, now it's time to explore other parts of Portugal. Travel about 274 kilometres south to Lisbon to tick off its top sights. From Torre de Belem Garden to Estrela At Lisbon - Tram 28 and Archaeological museum of Sao Jorge Castle, you'll have a full itinerary ahead.

  • Around 274 kilometres south of Porto, Amadora is another favourite stop in Portugal. Experience the best of this destination with a visit to Jardim Porta do Viveiro Alfragide, Jardim Caracol do Victor Alfragide and Jardim e estatua Eduardo Jorge.

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