Cheap flights from Baltimore to San Diego from $159 BWI → CLD, SAN
Baltimore/Wash International Thurgood Marshall Airport (BWI) → McClellan-Palomar Airport (CLD), San Diego International Airport (SAN)
The cheapest return found recently is $414 with Frontier Airlines, 1 Dec – 24 Dec, found 8 hours ago. The cheapest one-way found recently is $159 with Frontier Airlines, 11 Jan 2027, found yesterday.
- Cheapest one-way found recently
- $159, found yesterday
- Cheapest return found recently
- $414, 1 Dec to 24 Dec
- Usual return price
- $452 to $533
- Cheapest month to fly
- December 2026, return fares from $414 found in the last 7 days
Return
The cheapest return fare on each of 5 departure dates is usually $452 to $533.
Cheapest return found recently
$414
1 Dec – 24 Dec · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → San Diego International Airport (SAN)
Leaves 6:03 p.m. · Return leaves 9:50 a.m. · 46 h 8 min of travel, both ways together
out 3 stops, back nonstop · via Hartsfield-Jackson Atlanta International Airport (ATL), Dallas/Fort Worth International Airport (DFW), McCarran International Airport (LAS) · separate tickets likely: collect your bags and check in again · overnight connection · 22 h connection
found 8 hours ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$414 1 Dec – 24 Decfound 8 hours agoSee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 44 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $154 to $657.
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 5 departure dates from 14 Nov to 4 Jan 2027, 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 23-night return fares leaving within 3 days of 1 Dec to compare.
Every date we hold
56 fares on 5 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 14 Nov – 21 Nov | $466 | American Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → San Diego International Airport (SAN) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 20 Nov – 27 Nov | $533 | American Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → San Diego International Airport (SAN) | out 1 stop, back 1 stop | found 8 hours ago | See prices for these dates |
| 1 Dec – 24 Dec | $414 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → San Diego International Airport (SAN) | out 3 stops, back nonstop | found 8 hours ago | See prices for these dates |
| 27 Dec – 1 Jan 2027 | $673 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → San Diego International Airport (SAN) | out 2 stops, back 1 stop | found 6 days ago | See prices for these dates |
| 4 Jan 2027 – 26 Jan 2027 | $452 | Alaska Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → San Diego International Airport (SAN) | out 1 stop, back nonstop | found today | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $414.
Airlines on the cheapest dates: American Airlines, Frontier Airlines, Alaska Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$159
11 Jan 2027 · Frontier Airlines
Baltimore/Wash International Thurgood Marshall Airport (BWI) → San Diego International Airport (SAN)
Leaves 10:38 a.m. · 48 h 33 min trip
3 stops
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$159 11 Jan 2027found yesterdayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 7 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $142 to $187.
7 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?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 11 Jan 2027 to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 11 Jan 2027 | $159 | Frontier Airlines | Baltimore/Wash International Thurgood Marshall Airport (BWI) → San Diego International Airport (SAN) | 3 stops | found yesterday | Open this trip |
Airlines on the cheapest dates: Frontier Airlines.
Premium cabin fares from Baltimore to San Diego
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 1 Dec – 24 Dec in another cabin: Premium economy · Business · First
Today's prices for 11 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Baltimore to San Diego?
Return
Fares 30 to 59 days before departure were typically 25% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 12 Nov (44 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $472 | $466 | +34% | 14 |
| 7–13 days | $472 | $472 | +34% | 15 |
| 14–29 days | $357 | $154 | +1% | 12 |
| 30–59 days | $353 | $291 | Cheapest seen | 25 |
| 90–179 days | $442 | $363 | +25% | 16 |
| 180+ days | $474 | $474 | +34% | 8 |
One-way
Not enough history yet: in 7 days of one-way prices, 24 Sept to 12 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
Washington → San Diego
57 km from Baltimore
$281
$133 less than flying from Baltimore
4 Jan 2027 – 26 Jan 2027 · DCA → SAN · out 1 stop, back 1 stop
found 8 hours ago
Philadelphia → San Diego
145 km from Baltimore
$379
$35 less than flying from Baltimore
18 Dec – 29 Dec · PHL → SAN · out 1 stop, back 1 stop
found today
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Washington → San Diego
57 km from Baltimore
$139
$20 less than flying from Baltimore
11 Jan 2027 · DCA → SAN · 1 stop
found yesterday
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 1 Dec – 24 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 return flight from Baltimore to San Diego?
The cheapest return found recently is $414 with Frontier Airlines, 1 Dec to 24 Dec, found 8 hours ago. The cheapest return fare on each of 5 departure dates is usually $452 to $533.
How much is a one-way flight from Baltimore to San Diego?
The cheapest one-way found recently is $159 with Frontier Airlines, 11 Jan 2027, found yesterday.
What is the cheapest month to fly from Baltimore to San Diego?
December 2026 is the cheapest month for a return, from $414, 1 Dec to 24 Dec, found 8 hours ago.
How far ahead should I book a flight from Baltimore to San Diego?
In 44 days of prices between 24 Sept and 12 Nov, return fares 30 to 59 days before departure were typically 25% lower than 0 to 6 days before departure.
How long is the flight from Baltimore to San Diego?
The cheapest one-way found recently, with Frontier Airlines on 11 Jan 2027, takes 48 h 33 min with 3 stops.
Which airlines have the cheapest flights from Baltimore to San Diego?
Between 14 Nov and 4 Jan 2027, American Airlines has the cheapest return on 2 of the 5 departure dates we hold, Frontier Airlines on 2 and Alaska Airlines on 1.
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