Question 1

What is the cheapest month to book a flight from Portsmouth to Washington, D.C. Dulles Intl Airport?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Portsmouth to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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.

Question 2

What is the cheapest day to fly from Portsmouth to Washington, D.C. Dulles Intl Airport?

Accepted Answer

Travellers seeking maximum savings on their Portsmouth to Washington, D.C. Dulles Intl Airport 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.

Question 3

E

Accepted Answer

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

Question 4

E

Accepted Answer

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Question 5

What are the cheapest flights from Portsmouth to Washington, D.C. Dulles Intl Airport?

Accepted Answer

The cheapest flight price from Portsmouth to Washington, D.C. Dulles Intl Airport is £478. On average you can expect to pay £1,179. The most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl), can usually be booked for £643.

Question 6

What are the most reliable airlines from Portsmouth to Washington, D.C. Dulles Intl Airport?

Accepted Answer

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portsmouth to Washington, D.C. Dulles Intl Airport on time: KLM (90%), Air France (90%), Delta (90%).

Question 7

What are the most popular airlines that fly from Portsmouth to Washington, D.C. Dulles Intl Airport?

Accepted Answer

When booking a flight from Portsmouth to Washington, D.C. Dulles Intl Airport, you may want to consider flying on Air France, Finnair or British Airways as they are the most popular for this route.

Question 8

How far in advance should I book a flight from Portsmouth to Washington, D.C. Dulles Intl Airport?

Accepted Answer

To save on the cost of your flight from Portsmouth to Washington, D.C. Dulles Intl Airport, book at least 50 days before your planned departure. Booking around this time can save you about 34% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £551 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £704.

Question 9

What is the cheapest month to fly from Portsmouth to Washington, D.C. Dulles Intl Airport?

Accepted Answer

The best pricing can be found in the month of February. Prices to Washington, D.C. Dulles Intl Airport from Portsmouth average £566. You can even find prices in February for less than £566, as users have found deals to Washington, D.C. Dulles Intl Airport from as low as £236. The month of July appears to be one of the more expensive times to travel to Washington, D.C. Dulles Intl Airport from Portsmouth. Flying in the targeted month can save you up to 17%.

Question 10

What is the cheapest time of day to fly from P0R to IAD?

Accepted Answer

When flying from Portsmouth to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Question 11

Can I find deals for flights from Portsmouth to Dulles Intl that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Portsmouth to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 12

How can I find direct flights from Portsmouth to Dulles Intl?

Accepted Answer

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

Question 13

Can I find deals for business class flights from Portsmouth to Dulles Intl?

Accepted Answer

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

Question 14

How does Cheapflights help users find flights from Portsmouth to Dulles Intl?

Accepted Answer

When you search for this flight from Portsmouth to Dulles Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 15

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Dulles Intl?

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from Portsmouth to Dulles Intl by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 16

Can Cheapflights find flights from Portsmouth to Dulles Intl with no change fees?

Accepted Answer

Yes! Cheapflights helps users easily find flights from Portsmouth to Dulles Intl with no change fees.

Question 17

Can Cheapflights notify me if prices for flights from Portsmouth to Dulles Intl become cheaper?

Accepted Answer

Of course! You can now track prices for flights from Portsmouth to Dulles Intl and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

Round-trip from	£556
One-way from	£484
Popular in	July
Cheapest in	February
Average price	£525

Airline	Cheapest	Average	Flexibility	On-time
PLAY	Cheapest£274	Average£479	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
Delta	Cheapest£331	Average£790	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Icelandair	Cheapest£360	Average£527	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£364	Average£622	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Brussels Airlines	Cheapest£396	Average£742	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Scandinavian Airlines	Cheapest£455	Average£595	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Air France	Cheapest£456	Average£635	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Finnair	Cheapest£469	Average£638	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
British Airways	Cheapest£483	Average£649	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Aer Lingus	Cheapest£493	Average£631	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights

Cheap flights from Portsmouth to Washington, D.C. Dulles Intl Airport from £484

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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to Dulles Intl

Keep the following information in mind while searching for Portsmouth to Dulles Intl flight deals. Data was last updated 28 March 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portsmouth to Dulles Intl

Cheapest flights from Portsmouth to Dulles IntlExplore the most affordable flight options available from Portsmouth to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 March 2025.

Explore the most affordable flight options available from Portsmouth to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 March 2025.

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Use the filters below to find and compare flights from Portsmouth to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Portsmouth to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portsmouth with our price prediction graph.

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Everything you need to know about your flight from Portsmouth to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Portsmouth to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from P0R to IAD?

Find hourly flight availability from Portsmouth to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 28 March 2025.

What is the cheapest day to fly from Portsmouth to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly return from Portsmouth to Dulles Intl. Price data was last updated on 26 May 2024.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

Related info for your journey

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

What are the most reliable airlines from Portsmouth to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from Portsmouth to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Portsmouth to Dulles Intl that include hotel bookings?

How can I find direct flights from Portsmouth to Dulles Intl?

Can I find deals for business class flights from Portsmouth to Dulles Intl?

What is the cheapest month to book a flight from Portsmouth to Washington, D.C. Dulles Intl Airport?

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Can Cheapflights find flights from Portsmouth to Dulles Intl with no change fees?

Can Cheapflights notify me if prices for flights from Portsmouth to Dulles Intl become cheaper?

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Cheapest flights from Portsmouth to Dulles Intl
Explore the most affordable flight options available from Portsmouth to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 March 2025.