AirSource

Flights San Francisco → Washington — September 12, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Saturday, September 12, 2026 on the San Francisco–Washington route: 1 stop itinerary (2 flights) via Las Vegas Harry Reid (LAS), from San Francisco International (SFO) to Washington Dulles (IAD), first flight Frontier Airlines F92486, departs 3:15 PM, arrives 6:20 AM the next day, total travel time 12h 5m including layovers, flight time 6h 22m (layovers excluded), $235 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable. Price found in an Aviasales search on September 9, 2026 and read by AirSource on September 10, 2026, 20:48 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: Alaska Airlines AS8, from San Francisco International (SFO) to Washington Reagan National (DCA), departs 9:39 AM, arrives 5:59 PM, direct, 5h 20m, $518 per person.

Lowest price observed in the available data

1-stop itinerary (2 flights)

via Las Vegas Harry Reid (LAS) · first flight Frontier Airlines F92486

1 stop
Sat, Sep 12
San Francisco International (SFO)
12h 5m
1 stop
+1
Sun, Sep 13
Washington Dulles (IAD)
First flight
Frontier Airlines F92486 (1st of 2 flights)
Connecting flights
Operated after the layover in Las Vegas Harry Reid (LAS); airline and flight number are not provided by Aviasales in this record: see them on the booking site.
Departure
San Francisco International (SFO) · September 12, 2026 · local time (UTC-7)
Final arrival
Washington Dulles (IAD) · September 13, 2026 · local time (UTC-4) · next day
Stops
1 stop · in Las Vegas Harry Reid (LAS)
Total travel time
12h 5m (layovers included)
Flight time
6h 22m (layovers excluded)
Layover time
5h 43m
Carry-on bag
not included (personal item only)
Checked bag
not included
Changes
not allowed
Refund
non-refundable
Last observed price
$235 per person, one way
Observed
Price and fare conditions found in an Aviasales search on · read by AirSource on
Last observed price
$235
per person, one way
Check the current price and book

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Price not guaranteed: it is confirmed on Aviasales at booking time. How it works

Cheapest direct flight observed

Alaska Airlines AS8

Direct · San Francisco International (SFO) → Washington Reagan National (DCA)

Direct
Sat, Sep 12
San Francisco International (SFO)
5h 20m
direct
Sat, Sep 12
Washington Reagan National (DCA)
Airline
Alaska Airlines (AS)
Flight
AS8
Departure
San Francisco International (SFO) · September 12, 2026 · local time (UTC-7)
Arrival
Washington Reagan National (DCA) · September 12, 2026 · local time (UTC-4)
Stops
Direct (no plane change, as stated by the source; it can include a stop)
Duration
5h 20m
Last observed price
$518 per person, one way
Observed
Price and fare conditions found in an Aviasales search on · read by AirSource on
Last observed price
$518
per person, one way
Check the current price and book

Affiliate link. Booking, payment and support are handled by the seller you choose on Aviasales.

Price not guaranteed: it is confirmed on Aviasales at booking time. How it works

Looking for other times? All San Francisco–Washington flights on September 12, 2026 on Aviasales.

Nearby dates