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

KLM, at $731, was found to be the cheapest airline from Redmond to Porto. An alternate airline flying to your destination would be United Airlines.

What is the cheapest month to book a flight from Redmond to Porto?

Currently, January is the cheapest month in which you can book a flight from Redmond to Porto (average of $523). Flying from Redmond to Porto in June is currently the most expensive (average of $1,029). 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.

What is the cheapest day to fly from Redmond to Porto?

Travelers seeking maximum savings on their Redmond to Porto flight should consider departing on Thursday mornings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

What is the cheapest time of day to fly from RDM to OPO?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Redmond to Porto as you normally would.

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

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

How can I find direct flights from Redmond to Porto?

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

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

Yes. Cheapflights offers flight deals from Redmond 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.

Find Flights from Redmond to Porto

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Best time to book a flight from Redmond to Porto

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Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Porto

See what other customers who have flown with KLM and United Airlines from Redmond to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.8

Good

1,381 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

KLM

7.8

Good

1,381 reviews

KLM

7.8

Good

1,381 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

United Airlines

7.4

Good

8,916 reviews

KLM

7.8

Good

1,381 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

What are the cheapest airlines flying from Redmond to Porto round-trip?
KLM, at $731, was found to be the cheapest airline from Redmond to Porto. An alternate airline flying to your destination would be United Airlines.
Can I find deals for flights from Redmond to Porto that include hotel bookings?
Yes. In addition to deals on Redmond to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Redmond to Porto?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Redmond to Porto.
Can I find deals for business class flights from Redmond to Porto?
Yes. Cheapflights offers flight deals from Redmond 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.
What is the cheapest month to book a flight from Redmond to Porto?
Currently, January is the cheapest month in which you can book a flight from Redmond to Porto (average of $523). Flying from Redmond to Porto in June is currently the most expensive (average of $1,029). 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.

See more FAQs

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Top 2 airlines flying from Redmond to Porto

Airline	Cheapest	Average	Flexibility	On-time
KLM	Cheapest$731	Average$1,281	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$962	Average$1,244	FlexibilityNo cancel fee	On-time69%

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Find cheap flights from Redmond to Porto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Best time to book a flight from Redmond to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Redmond with our price prediction graph.

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 August 14, 2025.

See what other customers who have flown with KLM and United Airlines from Redmond to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

How can I find direct flights from Redmond to Porto?

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

What is the cheapest month to book a flight from Redmond to Porto?

Traveling to a place near Porto?

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 Redmond to Porto

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Redmond to Porto by cabin class

Find flights from Redmond to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Redmond and Porto flights

Browse other Redmond and Porto flight options. Last updated on August 14, 2025.

Other flights from Redmond

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Other flights to Porto

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Top 2 airlines flying from Redmond to Porto

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Cheap flights from Redmond (RDM) to Porto (OPO)

Find cheap flights from Redmond to Porto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Best time to book a flight from Redmond to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Redmond with our price prediction graph.

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 August 14, 2025.

See what other customers who have flown with KLM and United Airlines from Redmond to Porto have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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

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

How can I find direct flights from Redmond to Porto?

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

What is the cheapest month to book a flight from Redmond to Porto?

Traveling to a place near Porto?

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 Redmond to Porto

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Redmond to Porto

100% Free

Book with Flexibility

Travel Smart