Seattle to San Antonio BFI, SEA → SAT
Boeing Field International Airport (BFI), Seattle-Tacoma International Airport (SEA) → San Antonio International Airport (SAT)
The cheapest return found recently is $255 with Frontier Airlines, 26 Oct – 31 Oct, found yesterday.
Return
The cheapest return fare on each of 4 departure dates is usually $278 to $368.
Cheapest return found recently
$255
26 Oct – 31 Oct · Frontier Airlines
Seattle-Tacoma International Airport (SEA) → San Antonio International Airport (SAT)
Leaves 9:16 p.m. · Return leaves 5:26 p.m. · 26 h 43 min of travel, both ways together
out 1 stop, back nonstop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$255 26 Oct – 31 Octfound yesterdaySee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 9 days, 3 Oct to 18 Oct, the cheapest return we saw each day was $255 to $497.
At $255, the cheapest return found recently is at the low end of that range.
9 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 22 Oct to 1 Nov, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 5-night return fares leaving within 3 days of 26 Oct to compare.
Every date we hold
5 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 22 Oct – 27 Nov | $444 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → San Antonio International Airport (SAT) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 26 Oct – 31 Oct | $255 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → San Antonio International Airport (SAT) | out 1 stop, back nonstop | found yesterday | See prices for these dates |
| 31 Oct – 5 Nov | $285 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → San Antonio International Airport (SAT) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 1 Nov – 5 Nov | $343 | Frontier Airlines | Seattle-Tacoma International Airport (SEA) → San Antonio International Airport (SAT) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
Which month looks cheapest?
October 2026 is the cheapest month — from $255.
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Seattle to San Antonio
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 26 Oct – 31 Oct in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Seattle to San Antonio?
Return
Not enough history yet: in 9 days of return prices, 3 Oct to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Seattle → Austin
118 km from San Antonio
$337
$82 more than flying to San Antonio
5 Jan 2027 – 13 Jan 2027 · SEA → AUS · out nonstop, back nonstop
found 4 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Seattle → Austin
118 km from San Antonio
$153
4 Jan 2027 · SEA → AUS · nonstop
found 3 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 26 Oct – 31 Oct. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work