Cheap flights from Portsmouth, MA to San Antonio, TX

Flights starting at $146. Choose between Allegiant Air, Spirit Airlines, or Frontier Airlines to find the best price.

Make your travel wishlist, we'll do the rest
Hidden deals
Effortless booking
Travel hacking

Tips to know when travelling to San Antonio

Round trips

Mailbox
Receive exclusive deals by email
Book your trip to arrive at San Antonio International, San Antonio, or San Antonio-Pearl. The most popular airlines for this route are Allegiant Air, Spirit Airlines, Frontier Airlines, JetBlue Airways, and VivaAerobus. Portsmouth and San Antonio have 37 direct flights per week.

Check-in for a flight from Portsmouth to San Antonio

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Allegiant AirAAYG4NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
JetBlue AirwaysJBUB6NoOpens 24 days before flight
Closes 2 hours before flight
VivaAerobusVIVVBNoOpens 72 days before flight
Closes 4 hours before flight

Weather in San Antonio

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January17°C7°C
February19°C9°C
March23°C12°C
April27°C16°C
May30°C19°C
June34°C23°C
July35°C24°C
August36°C25°C
September32°C22°C
October28°C17°C
November21°C12°C
December18°C9°C
Hottest Month
36°C
August
Coldest month
7°C
January
Sunny days
300
days per year

14 day forecast

Monday
18 Mar
17°C12°C
25 Mar
89%
26°C18°C
Tuesday
19 Mar
13°C9°C
26 Mar
81%
24°C15°C
Wednesday
20 Mar
89%
16°C11°C
27 Mar
25°C13°C
Thursday
21 Mar
89%
27°C15°C
28 Mar
25°C12°C
Friday
22 Mar
27°C14°C
29 Mar
24°C14°C
Saturday
23 Mar
50%
22°C13°C
30 Mar
70%
29°C16°C
Sunday
24 Mar
22°C14°C
31 Mar
30°C18°C

Frequently asked questions

What are the most popular routes to and from Portsmouth?
What are the most popular routes to and from San Antonio?
What airports are near Portsmouth?
What airports are near San Antonio?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Portsmouth and San Antonio?
What is Virtual Interlining and how do I use it?
Which airlines fly between Portsmouth and San Antonio?
When's the best time to travel between Portsmouth and San Antonio?
What flights operate between Portsmouth and San Antonio?
How many airports are there near Portsmouth?
How many airports are there near San Antonio?
What time do nonstop (direct) flights between Portsmouth and San Antonio depart?
What time do nonstop (direct) flights between Portsmouth and San Antonio arrive?
What time do flights between Portsmouth and San Antonio depart?
What time do flights between Portsmouth and San Antonio arrive?

Explore alternative trips

Flights from Portsmouth

Flights to San Antonio

Popular routes

Find the best connection from Portsmouth to San Antonio
Search flights, trains & buses
We hack the system,
you fly for less