$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
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Antonio 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.Cheap flight deals from San Antonio to Portsmouth
Cheapest
Best
Last-minute
Cheapest flights from San Antonio to PortsmouthExplore 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.
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![KLM logo]()
$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![Scandinavian Airlines logo]()
$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![Delta logo]()
$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![Delta logo]()
$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![Multiple Airlines logo]()
$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![Multiple Airlines logo]()
$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![Multiple Airlines logo]()
$4,596
Best flights from San Antonio to PortsmouthDiscover 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 February 4, 2026.
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 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![KLM logo]()
$773
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![Delta logo]()
$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![Delta logo]()
$1,087
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![Multiple Airlines logo]()
$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![Multiple Airlines logo]()
$4,596
Last-minute flights from San Antonio to PortsmouthDiscover last-minute flight deals from San Antonio to Portsmouth. Data last updated February 4, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Portsmouth. Data last updated February 4, 2026 and is based on user searches.
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![KLM logo]()
$773
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![Delta logo]()
$1,038
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![Multiple Airlines logo]()
$2,677
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![Delta logo]()
$1,087
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![Multiple Airlines logo]()
$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 |
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
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.
SAT-SOU
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
SAT-P0R
SAT-SOU
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.
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
Complete your trip
Flights by cabin class
Other flight options
Other flights from San Antonio
Popular flights
Top destinations
Alternative routes for San Antonio 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 San Antonio to Portsmouth by cabin class
Find flights from San Antonio to Portsmouth, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San Antonio and Portsmouth flights
Browse other San Antonio and Portsmouth flight options. Last updated on February 4, 2026.
Other flights from San Antonio
Browse through other flights departing from San Antonio. Flights are based on user searches made on Cheapflights and were last updated on February 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
San Antonio to Portsmouth flights
Consider these flights traveling from San Antonio to Portsmouth.
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.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$530 | Average$703 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$530 | Average$848 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$531 | Average$929 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$563 | Average$829 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$600 | Average$780 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$668 | Average$999 | FlexibilityNo cancel fee | On-time77% |