Weekly flight availability from USA to Portsmouth

The most flights from US0 to P0R are scheduled on a Monday (58 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (35 on average).

In terms of precipitation, rainfall in Portsmouth ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Portsmouth when rainfall is around 1.0 in.

If weather is an important factor for your trip to Portsmouth, 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 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

What are the most popular routes from USA to Portsmouth?

When deciding which route to take from USA to Portsmouth consider New York John F Kennedy Intl - Southampton Eastleigh, Newark - Southampton Eastleigh or Washington, D.C. Dulles Intl - Southampton Eastleigh as they are the most popular.

What are the cheapest flights from USA to Portsmouth?

While on average a flight from USA to Portsmouth is generally $2,896, our data shows the cheapest flight currently is $324. When looking at the most popular route, (New York John F Kennedy Intl - Southampton Eastleigh), you can expect to pay $807 for that flight.

What are the most reliable airlines from USA to Portsmouth?

Before booking your flight to Portsmouth from USA, check out the most reliable airlines to get you to your destination on time: SriLankan Airlines (93%), KLM (90%), SAUDIA( 90%).

What are the most popular airlines that fly from USA to Portsmouth?

When booking a flight from USA to Portsmouth, you may want to consider flying on Aer Lingus, Delta or KLM as they are the most popular for this route.

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

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

How can I find direct flights from USA to Portsmouth?

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

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

Yes. Cheapflights offers flight deals from USA to Portsmouth 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 Cheap Flights from the United States to Portsmouth

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from USA to Portsmouth with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from USA to Portsmouth

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	June
Cheapest in	January
Average price	$739

Provider with most accurate pricing for New York (NYC)-London (LON) flight deals.

Search Deals

Provider most trusted by Cheapflights users for New York (NYC)-London (LON) flights.

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($128 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Cheapflights Insights

Everything you need to know about your flight from the United States to Portsmouth

Prices

Airlines

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

It’s typically best to fly out from USA to Portsmouth in the morning. Doing so could potentially save you 8% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from USA to Portsmouth?

Travelers seeking maximum savings on their USA to Portsmouth flight should consider departing on Thursday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Portsmouth

See what other customers who have flown with KLM,Delta, andAer Lingus from the United States to Portsmouth 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

1,587 reviews

Reviews

1 / 20

4.0

Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

KLM

7.8

Good

1,587 reviews

KLM

7.8

Good

1,587 reviews

Reviews

1 / 20

4.0

Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Delta

7.8

Good

8,650 reviews

KLM

7.8

Good

1,587 reviews

Reviews

1 / 20

4.0

Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Aer Lingus

7.3

Good

1,833 reviews

KLM

7.8

Good

1,587 reviews

Reviews

1 / 20

4.0

Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Related info for your journey

What are the most popular routes from USA to Portsmouth?
When deciding which route to take from USA to Portsmouth consider New York John F Kennedy Intl - Southampton Eastleigh, Newark - Southampton Eastleigh or Washington, D.C. Dulles Intl - Southampton Eastleigh as they are the most popular.
What are the most reliable airlines from USA to Portsmouth?
Before booking your flight to Portsmouth from USA, check out the most reliable airlines to get you to your destination on time: SriLankan Airlines (93%), KLM (90%), SAUDIA( 90%).
What are the cheapest flights from USA to Portsmouth?
While on average a flight from USA to Portsmouth is generally $2,896, our data shows the cheapest flight currently is $324. When looking at the most popular route, (New York John F Kennedy Intl - Southampton Eastleigh), you can expect to pay $807 for that flight.
Can I find deals for flights from USA to Portsmouth that include hotel bookings?
Yes. In addition to deals on USA to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from USA to Portsmouth?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from USA to Portsmouth.
Can I find deals for business class flights from USA to Portsmouth?
Yes. Cheapflights offers flight deals from USA to Portsmouth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Flights by cabin class

Other flight options

Popular flights

Top destinations

Alternative routes for USA to Portsmouth

John F Kennedy Intl to Heathrow flights

Newark to Heathrow flights

LaGuardia to Heathrow flights

John F Kennedy Intl to Gatwick flights

Boston to Heathrow flights

John F Kennedy Intl to London City flights

Newark to Gatwick flights

Dulles Intl to Heathrow flights

LaGuardia to Gatwick flights

Los Angeles to Heathrow flights

O'Hare Intl to Heathrow flights

San Francisco to Heathrow flights

Baltimore to Heathrow flights

Newark to London City flights

Newark to Stansted flights

Dallas/Fort Worth to Heathrow flights

Newark to Luton flights

Seattle to Heathrow flights

Boston to Gatwick flights

Atlanta to Heathrow flights

Reagan-National to Heathrow flights

Boston to Stansted flights

Hobby to Heathrow flights

Orlando to Heathrow flights

Dulles Intl to Gatwick flights

Dulles Intl to Stansted flights

Miami to Heathrow flights

Los Angeles to Gatwick flights

Denver to Heathrow flights

Philadelphia to Heathrow flights

George Bush Intcntl to Heathrow flights

Los Angeles to Stansted flights

O'Hare Intl to Gatwick flights

Los Angeles to London City flights

Boston to Luton flights

O'Hare Intl to Stansted flights

San Francisco to Gatwick flights

Baltimore to Gatwick flights

Newark to Edinburgh flights

Sky Harbor Intl to Heathrow flights

San Francisco to Stansted flights

Orlando to Gatwick flights

San Francisco to London City flights

Benito Juarez to Heathrow flights

Top 10 airlines flying from USA to Portsmouth

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$263	Average$615	FlexibilityNo cancel fee	On-time76%
Condor	Cheapest$280	Average$280	FlexibilityNo cancel fee	On-time76%
Brussels Airlines	Cheapest$291	Average$1,111	FlexibilityNo cancel fee	On-timeN/A
Air Europa	Cheapest$319	Average$856	FlexibilityNo cancel fee	On-time83%
JetBlue	Cheapest$329	Average$962	FlexibilityNo cancel fee	On-time62%
SWISS	Cheapest$352	Average$904	FlexibilityNo cancel fee	On-time79%
Norse Atlantic UK	Cheapest$362	Average$682	FlexibilityNo cancel fee	On-timeN/A
TAP AIR PORTUGAL	Cheapest$396	Average$674	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$409	Average$803	FlexibilityNo cancel fee	On-time77%
Aer Lingus	Cheapest$429	Average$881	FlexibilityNo cancel fee	On-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from the United States to Portsmouth, England

Find cheap flights from USA to Portsmouth with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from USA to Portsmouth

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Insights

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

It’s typically best to fly out from USA to Portsmouth in the morning. Doing so could potentially save you 8% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from USA to Portsmouth?

Travelers seeking maximum savings on their USA to Portsmouth flight should consider departing on Thursday evenings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from USA to Portsmouth

The most flights from US0 to P0R are scheduled on a Monday (58 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (35 on average).

Reviews of airlines servicing Portsmouth

See what other customers who have flown with KLM,Delta, andAer Lingus from the United States to Portsmouth 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

What are the most popular routes from USA to Portsmouth?

What are the most reliable airlines from USA to Portsmouth?

What are the cheapest flights from USA to Portsmouth?

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

How can I find direct flights from USA to Portsmouth?

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

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 USA to Portsmouth

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

Complete your trip

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

Search flights from USA to Portsmouth by cabin class

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

USA and Portsmouth flights

Browse other USA and Portsmouth flight options. Last updated on October 14, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

USA to Portsmouth flights

Consider these flights traveling from USA to Portsmouth.

Top 10 airlines flying from USA to Portsmouth

100% Free

Book with Flexibility

Travel Smart