In terms of precipitation, rainfall in Washington, D.C. Reagan-National 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. Reagan-National Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Reagan-National 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).

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

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

Can I find deals for flights from Portsmouth to Reagan-National that include hotel bookings?

Yes. In addition to deals on Portsmouth to Reagan-National flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Portsmouth to Reagan-National?

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

Can I find deals for business class flights from Portsmouth to Reagan-National?

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

£447+ Cheap Flights from Portsmouth to Washington, D.C. Reagan-National Airport

Cheap flight deals from Portsmouth to Reagan-National

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Cheapest flights from Portsmouth to Reagan-National
Explore the most affordable flight options available from Portsmouth to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Wed 28/1008:40 -

2 stops17h 15m

Wed 4/1106:08 -

2 stops21h 02m

Deal found 13/9£639

Sun 25/1009:30 -

2 stops17h 25m

Sun 1/1110:10 -

2 stops17h 00m

Deal found 10/9£660

Fri 11/1208:40 -

2 stops16h 19m

Mon 11/112:59 -

2 stops14h 11m

Deal found 13/9£699

Fri 18/1220:00 -

2 stops27h 18m

Sun 3/120:45 -

2 stops39h 15m

Deal found 13/9£5,365

Find flight deals from Portsmouth to Reagan-National

Round-trip from	£660
One-way from	£447
Popular in	June
Cheapest in	February
Average price	£484

Delta
25/10-1/11
4 total stops
34h 25m total
Portsmouth to Washington, D.C.

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Delta
23/11-31/12
2 total stops
14h 19m total
Portsmouth to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£38 potential increase over avg. return price).

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Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).

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Average for round-trip flights in September 2026

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Cheapflights Fare Finder

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

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SouthamptonWashington, D.C.

SOU Southampton Eastleigh - DCA Washington, D.C. Reagan-National

SOUDCA

Southampton Eastleigh

Mon 23/11

08:40-17:59

2 stops14h 19m

Washington, D.C. Reagan-National

Wed 31/12

00:00-06:00

Nonstop0h 00m

£447

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - DCA Washington, D.C. Reagan-National

SOUDCA

Southampton Eastleigh

Wed 28/10

08:40-21:55

2 stops17h 15m

Washington, D.C. Reagan-National

Wed 4/11

06:08-08:10

2 stops21h 02m

£639

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - DCA Washington, D.C. Reagan-National

SOUDCA

Southampton Eastleigh

Sun 25/10

09:30-22:55

2 stops17h 25m

Washington, D.C. Reagan-National

Sun 1/11

10:10-08:10

2 stops17h 00m

£660

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - DCA Washington, D.C. Reagan-National

SOUDCA

Southampton Eastleigh

Fri 11/12

08:40-19:59

2 stops16h 19m

Washington, D.C. Reagan-National

Mon 11/1

12:59-08:10

2 stops14h 11m

£699

Flights are sorted by cheapest return flights first.

Deals found on 12/9

Sorted by cheapest first

Best time to book a flight from Portsmouth to Reagan-National

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

SOU-DCA

Estimated return 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.

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Everything you need to know about your flight from Portsmouth to Washington, D.C. Reagan-National Airport

P0R-DCA

SOU-DCA

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Portsmouth to Washington, D.C. Reagan-National Airport?
Departing from Portsmouth to Washington, D.C. Reagan-National Airport will take you 17h 15m. The distance between Portsmouth and Washington, D.C. Reagan-National Airport is about 3626 mi.
Can I find deals for flights from Portsmouth to Reagan-National that include hotel bookings?
Yes. In addition to deals on Portsmouth to Reagan-National flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portsmouth to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Reagan-National.
Can I find deals for business class flights from Portsmouth to Reagan-National?
Yes. Cheapflights offers flight deals from Portsmouth to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Top 5 airlines flying from Portsmouth to Reagan-National

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£413	Average£489	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£431	Average£580	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Virgin Atlantic	Cheapest£432	Average£512	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
JetBlue	Cheapest£433	Average£542	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
American Airlines	Cheapest£540	Average£579	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

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When you search for this flight from Portsmouth to Reagan-National, 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.

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Cheap flights from Portsmouth to Washington, D.C. Reagan-National Airport from £447

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to Reagan-National

Cheapest flights from Portsmouth to Reagan-NationalExplore the most affordable flight options available from Portsmouth to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Explore the most affordable flight options available from Portsmouth to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Best flights from Portsmouth to Reagan-NationalDiscover carefully curated flight deals from Portsmouth to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Discover carefully curated flight deals from Portsmouth to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Last-minute flights from Portsmouth to Reagan-NationalDiscover last-minute flight deals from Portsmouth to Reagan-National. Data last updated 13 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Reagan-National. Data last updated 13 September 2026 and is based on user searches.

One-way flights from Portsmouth to Reagan-NationalSearch for one-way flight options from Portsmouth to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

Search for one-way flight options from Portsmouth to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.

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Related info for your journey

How long is the flight from Portsmouth to Washington, D.C. Reagan-National Airport?

Can I find deals for flights from Portsmouth to Reagan-National that include hotel bookings?

How can I find direct flights from Portsmouth to Reagan-National?

Can I find deals for business class flights from Portsmouth to Reagan-National?

Travelling to a place near Washington, D.C. Reagan-National Airport?

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Alternative routes for Portsmouth to Reagan-National

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Complete your trip

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Top 5 airlines flying from Portsmouth to Reagan-National

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Can Cheapflights find flights from Portsmouth to Reagan-National with no change fees?

Can Cheapflights notify me if prices for flights from Portsmouth to Reagan-National become cheaper?

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Cheapest flights from Portsmouth to Reagan-National
Explore the most affordable flight options available from Portsmouth to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Best flights from Portsmouth to Reagan-National
Discover carefully curated flight deals from Portsmouth to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Last-minute flights from Portsmouth to Reagan-National
Discover last-minute flight deals from Portsmouth to Reagan-National. Data last updated 13 September 2026 and is based on user searches.

One-way flights from Portsmouth to Reagan-National
Search for one-way flight options from Portsmouth to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 13 September 2026.