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Portsmouth

$632+ Cheap flights from San Antonio (SAT) to Portsmouth, England

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 12/29. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheap flight deals from San Antonio to Portsmouth

Keep the following information in mind while searching for San Antonio to Portsmouth flight deals. Data was last updated October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$838
(Delta)

One-way from

$632
(Delta)

Popular in

January

Cheapest in

August

Average price

$798
Provider with most accurate pricing for San Antonio-London (LON) flight deals.
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Provider most trusted by Cheapflights users for San Antonio-London (LON) flights.
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From San Antonio to Portsmouth
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One-way flight from San Antonio to Portsmouth
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Highest demand for flights based on searches. 21% potential increase in price ($261 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($68 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from San Antonio to Portsmouth

Best flights from San Antonio to Portsmouth
Discover carefully curated flight deals from San Antonio to Portsmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 29, 2025.

This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2612:10 pmSAT - SOU
2 stops13h 55mDelta
Mon 3/25:30 pmSOU - SAT
2 stops29h 53mDelta
Deal found 10/26$838

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Antonio to Portsmouth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 29, 2025.
Use the filters below to find and compare flights from San Antonio to Portsmouth that are best for you.

Fly from

San Antonio

Fly to

Portsmouth

Route

Depart

Return

Price

San AntonioSouthampton

SAT - SOU

SATSOU

San Antonio

Thu 2/26

12:10 pm-8:05 am

2 stops13h 55m

Southampton Eastleigh

Mon 3/2

5:30 pm-5:23 pm

2 stops29h 53m

$838

San AntonioSouthampton

SAT - SOU

SATSOU

San Antonio

Mon 12/29

11:16 am-8:10 am

2 stops38h 54m

$632

San AntonioSouthampton

SAT - SOU

SATSOU

San Antonio

Tue 12/30

5:20 am-5:00 pm

2 stops29h 40m

$632

San AntonioSouthampton

SAT - SOU

SATSOU

San Antonio

Sun 12/28

6:22 pm-8:10 am

2 stops55h 48m

$647

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Best time to book a flight from San Antonio to Portsmouth

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

Cheapflights Insights

Everything you need to know about your flight from San Antonio to Portsmouth

What is the cheapest month to book a flight from San Antonio to Portsmouth?

Currently, August is the cheapest month in which you can book a flight from San Antonio to Portsmouth (average of $131). Flying from San Antonio to Portsmouth in June is currently the most expensive (average of $869). 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 time of day to fly from SAT to P0R?

Find hourly flight availability from San Antonio to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

One of the essential ways to save on airfare from San Antonio to Portsmouth is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 17% on airfare.

What is the cheapest day to fly from San Antonio to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from San Antonio to Portsmouth. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Antonio to Portsmouth flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

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

  • What airport do you fly from for flights from San Antonio to Portsmouth?

    For a flight from San Antonio to Portsmouth, you will be flying from San Antonio. San Antonio (SAT) is just 7.6 mi from the center of the city. San Antonio is the only San Antonio airport and it handles 0 outbound flights to Portsmouth per day. 6 airlines have flights to Portsmouth from San Antonio on a regular basis.

  • How long is the flight from San Antonio to Portsmouth?

    For as low as $838, Delta can have you in Portsmouth from San Antonio in 13h 55m. The distance from San Antonio to Portsmouth is about 4947 mi.

  • Can I find deals for flights from San Antonio to Portsmouth that include hotel bookings?

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

  • How can I find direct flights from San Antonio to Portsmouth?

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

  • Can I find deals for business class flights from San Antonio to Portsmouth?

    Yes. Cheapflights offers flight deals from San Antonio 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.

  • What is the cheapest month to book a flight from San Antonio to Portsmouth?

    Currently, August is the cheapest month in which you can book a flight from San Antonio to Portsmouth (average of $131). Flying from San Antonio to Portsmouth in June is currently the most expensive (average of $869). 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.

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Top 6 airlines flying from San Antonio to Portsmouth

Discover the top 6 airlines that operate flights from San Antonio to Portsmouth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$530Average$1,010FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$531Average$924FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$566Average$907FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$571Average$833FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$645Average$1,008FlexibilityNo cancel feeOn-time72%
IberiaCheapest$668Average$999FlexibilityNo cancel feeOn-time77%

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