Cheap flights from San Antonio to Washington from $152 SAT → IAD
San Antonio International Airport (SAT) → Washington Dulles International Airport (IAD)
The cheapest one-way found recently is $152 with Frontier Airlines, 25 Dec, found 2 days ago.
- Cheapest one-way found recently
- $152, found 2 days ago
- Cheapest month to fly
- December 2026, one-way fares from $152 found in the last 7 days
One-way
The cheapest one-way fare on each of 3 departure dates is usually $160 to $205.
Cheapest one-way found recently
$152
25 Dec · Frontier Airlines
San Antonio International Airport (SAT) → Washington Dulles International Airport (IAD)
Leaves 11:48 a.m. · 17 h 19 min trip
1 stop
found 2 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$152 25 Decfound 2 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 19 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $126 to $243.
19 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 one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 26 Nov to 25 Dec, 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 one-way fares leaving within 3 days of 25 Dec to compare.
Every date we hold
3 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 26 Nov | $168 | Frontier Airlines | San Antonio International Airport (SAT) → Washington Dulles International Airport (IAD) | 1 stop | found 5 days ago | Open this trip |
| 29 Nov | $241 | Frontier Airlines | San Antonio International Airport (SAT) → Washington Dulles International Airport (IAD) | 1 stop | found 5 days ago | Open this trip |
| 25 Dec | $152 | Frontier Airlines | San Antonio International Airport (SAT) → Washington Dulles International Airport (IAD) | 1 stop | found 2 days ago | Open this trip |
Which month looks cheapest?
December 2026 is the cheapest month — from $152.
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from San Antonio to Washington
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 25 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for San Antonio to Washington?
One-way
Not enough history yet: in 19 days of one-way prices, 24 Sept to 11 Nov, 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
Austin → Washington
118 km from San Antonio
$483
25 Nov – 29 Nov · AUS → IAD · out 1 stop, back 3 stops
found 6 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Austin → Washington
118 km from San Antonio
$240
$88 more than flying from San Antonio
29 Nov · AUS → IAD · 1 stop
found 5 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 one-way found recently is for 25 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a one-way flight from San Antonio to Washington?
The cheapest one-way found recently is $152 with Frontier Airlines, 25 Dec, found 2 days ago. The cheapest one-way fare on each of 3 departure dates is usually $160 to $205.
What is the cheapest month to fly from San Antonio to Washington?
December 2026 is the cheapest month for a one-way, from $152, 25 Dec, found 2 days ago.
How long is the flight from San Antonio to Washington?
The cheapest one-way found recently, with Frontier Airlines on 25 Dec, takes 17 h 19 min with 1 stop.
Which airlines have the cheapest flights from San Antonio to Washington?
Between 26 Nov and 25 Dec, Frontier Airlines has the cheapest one-way on all 3 departure dates we hold.
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