Portsmouth

$773+ Cheap flights from San Antonio (SAT) to Portsmouth, England

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Mar 6 — Mar 131
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Cheap flight deals from San Antonio to Portsmouth

Cheapest flights from San Antonio to Portsmouth
Explore the most affordable flight options available from San Antonio to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.

This KLM deal was found by Cheapflights users on 2/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/112:55 pm
SAT
-
SOU
2 stops22h 10m
KLM
Sun 3/89:30 am
SOU
-
SAT
2 stops31h 00m
KLM
Deal found 2/1$773
This KAYAK deal was found by Cheapflights users on 2/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1310:45 am
SAT
-
SOU
2 stops16h 00m
Scandinavian Airlines
Wed 8/269:15 am
SOU
-
SAT
2 stops21h 00m
Scandinavian Airlines
Deal found 2/4$913
This Delta deal was found by Cheapflights users on 2/2. 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.
Fri 3/201:00 pm
SAT
-
SOU
2 stops14h 50m
Delta
Fri 3/278:50 am
SOU
-
SAT
2 stops18h 40m
Delta
Deal found 2/2$1,038
This Delta deal was found by Cheapflights users on 2/3. 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.
Sat 3/216:13 am
SAT
-
SOU
2 stops21h 37m
Delta
Sat 3/289:25 am
SOU
-
SAT
2 stops20h 12m
Delta
Deal found 2/3$1,087
This Mytrip deal was found by Cheapflights users on 2/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:00 am
SAT
-
SOU
3 stops20h 20m
Multiple Airlines
Wed 8/266:20 pm
SOU
-
SAT
3 stops34h 09m
Multiple Airlines
Deal found 2/4$1,503
This Mytrip deal was found by Cheapflights users on 2/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/201:22 pm
SAT
-
SOU
3 stops18h 48m
Multiple Airlines
Fri 3/272:25 pm
SOU
-
SAT
3 stops25h 36m
Multiple Airlines
Deal found 2/2$2,677
This American Airlines deal was found by Cheapflights users on 2/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/215:19 am
SAT
-
SOU
2 stops22h 26m
Multiple Airlines
Sat 3/288:55 am
SOU
-
SAT
3 stops19h 12m
Multiple Airlines
Deal found 2/3$4,596

Find 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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$773
(KLM)

Popular in

January

Cheapest in

September

Average price

$728
Provider with most accurate pricing for San Antonio-London (LON) flight deals.
Provider most trusted by Cheapflights users for San Antonio-London (LON) flights.
From San Antonio to Portsmouth
Highest demand for flights based on searches. 20% potential increase in price ($232 potential increase over avg. RT price).
Cheapest flight prices on average. 8% potential price decrease ($71 potential savings vs. average RT price).
Average for round-trip flights in February 2026

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 February 4, 2026.
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

Sun 3/1

12:55 pm-5:05 pm

2 stops22h 10m

Southampton Eastleigh

Sun 3/8

9:30 am-11:30 am

2 stops31h 00m

$773

San AntonioSouthampton

SAT - SOU

SATSOU

San Antonio

Fri 3/20

1:00 pm-8:50 am

2 stops14h 50m

Southampton Eastleigh

Fri 3/27

8:50 am-10:30 pm

2 stops18h 40m

$1,038

San AntonioSouthampton

SAT - SOU

SATSOU

San Antonio

Sat 3/21

6:13 am-8:50 am

2 stops21h 37m

Southampton Eastleigh

Sat 3/28

9:25 am-12:37 am

2 stops20h 12m

$1,087

San AntonioSouthampton

SAT - SOU

SATSOU

San Antonio

Fri 3/20

1:22 pm-1:10 pm

3 stops18h 48m

Southampton Eastleigh

Fri 3/27

2:25 pm-11:01 am

3 stops25h 36m

$2,677

San AntonioSouthampton

SAT - SOU

SATSOU

San Antonio

Sat 3/21

5:19 am-8:45 am

2 stops22h 26m

Southampton Eastleigh

Sat 3/28

8:55 am-11:07 pm

3 stops19h 12m

$4,596

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

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 $839). 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.

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 $1,038, KLM can have you in Portsmouth from San Antonio in 14h 50m. The distance from San Antonio to Portsmouth is about 4947 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $839). 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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Alternative routes for San Antonio to Portsmouth

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

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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$530Average$703FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$530Average$848FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$531Average$929FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$563Average$829FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$600Average$780FlexibilityNo cancel feeOn-time72%
IberiaCheapest$668Average$999FlexibilityNo cancel feeOn-time77%

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