What's the cheapest way from the airport to downtown?
MTS Route 992. It's $2.50 for adults ($1.25 reduced), runs every 15 minutes seven days a week, and takes about 15 minutes to Santa Fe Depot downtown.
- Fare
- $2.50 adult · $1.25 reduced
- Journey time
- About 15 minutes
- Frequency
- Every 15 minutes
- Free alternative
- San Diego Flyer to Old Town
Route 992, one way
Terminals to Santa Fe Depot
4:30 a.m. – 1 a.m., seven days
Different destination, not a cheaper version
The short version
- MTS Route 992 runs direct from both terminals to Santa Fe Depot downtown: $2.50 adult, $1.25 reduced, about 15 minutes.
- It runs every 15 minutes, 4:30 a.m. to 1 a.m., seven days a week — frequent enough that you don't plan around it.
- The free San Diego Flyer goes to Old Town Transit Center, not downtown; take it only if Old Town, the Trolley, the COASTER or Amtrak is where you're actually headed.
- Pay by tapping a contactless card or phone on the validator — no PRONTO card needed unless you want one.
- San Diego's airport is unusually close to its downtown, which is the whole reason a single city bus is a serious option here.
San Diego International sits about three miles from the Gaslamp Quarter — close enough that the approach flies over downtown, and close enough that the cheap option is not a compromise. There are two transit routes out of the terminals and they go to two different places, which is the part people get wrong.
Two routes, two destinations
Route 992 is the paid one and it is the one that goes downtown. The Flyer is free and goes to Old Town, ten minutes north — useful, but not the same trip.
Route 992: the one that goes downtown
$2.50
Adult one way
$1.25 at the reduced fare
15 min
To Santa Fe Depot
Direct, no transfer
Every 15 min
All day and night
4:30 a.m. to 1 a.m.
992 stops on the elevated transit platform at both Terminal 1 and Terminal 2 and runs straight to Santa Fe Depot, which puts you a short walk from the Gaslamp Quarter, the Convention Centre, the waterfront and the Blue and Green Trolley lines. The buses on this route have custom luggage racks and wider doors, because MTS built the service around people carrying bags.
The assumption worth correcting is that public transit from an airport means a slow, multi-transfer slog with your suitcase on your knees. That is a fair description of a lot of American airport buses. It is not a description of this one: it is a direct bus, on a three-mile trip, arriving every quarter hour.
The free option goes somewhere else
The San Diego Flyer is genuinely free and runs every 20 to 30 minutes from 4:45 a.m. to 12:30 a.m. — but it goes to Old Town Transit Center, about ten minutes north of downtown. Its pick-ups and drop-offs are timed to meet the first and last Trolley, COASTER, Amtrak and MTS bus services of the day. It is for transit riders only, and there is no overnight parking there.
Which one do you want?
| Route 992 | San Diego Flyer | |
|---|---|---|
| Cost | $2.50 adult · $1.25 reduced | Free |
| Goes to | Santa Fe Depot, downtown | Old Town Transit Center |
| Runs | Every 15 min, 4:30 a.m.–1 a.m. | Every 20–30 min, 4:45 a.m.–12:30 a.m. |
| Take it if | You're staying downtown, in the Gaslamp, or by the waterfront | You're staying in Old Town, or connecting to the Trolley, COASTER or Amtrak |
| Don't take it if | Old Town is your destination — you'd be paying to go the wrong way | Downtown is your destination — free costs you a transfer and 25 minutes |
Paying for it
- 01
Just tap
Route 992 validators accept contactless credit and debit cards and mobile wallets. You don't need to buy anything before you board.
- 02
Or buy a PRONTO card at the airport
Ticket machines at the terminals sell them. Worth it only if you're going to ride transit repeatedly — PRONTO caps your spending across a day and a month.
- 03
Board on the elevated platform
Both terminals. Follow signs for transit, not for rideshare, which loads elsewhere.
When the bus isn't the answer
- You land after 1 a.m. or leave before 4:30 a.m. 992 isn't running; the Flyer's window is similar.
- You're three or four people with checked bags. At that point a single rideshare split several ways closes most of the gap, and you're not managing luggage on a platform.
- You're going somewhere neither route serves. North County, Coronado and the eastern suburbs all mean a connection; check the trip on MTS before assuming.
- Rideshare pricing is dynamic and we won't quote a figure we can't source. The number this page can stand behind is the fare: $2.50.
KEEP READING
SOURCES
Everything above traces back to one of these. Follow them — if one has changed and we haven't, that's our mistake, not yours.
San Diego Metropolitan Transit System · Checked September 8, 2026
Route 992 fare, journey time, frequency and hours; the San Diego Flyer's destination, hours and frequency; luggage racks; PRONTO and contactless payment.
- PrimaryPublic Transportation
San Diego International Airport (SAN) · Checked September 8, 2026
The airport's own description of where transit loads at each terminal.
San Diego Metropolitan Transit System · News release
Background on the Flyer service and its role alongside Route 992.