Cheap flights to San Diego
Round trips from 7 cities to San Diego, United States, from $33. Economy, per person, in USD.
Prices updated
Flights to San Diego by departure city
Cheapest round trip, per person-
Phoenix → San Diego
Oct 21 – 24 · Nonstop
$33
-
San Francisco → San Diego
Nov 10 – 12 · Nonstop
$41
-
Portland → San Diego
Jan 7 – 11, 2027 · Nonstop
$133
-
Denver → San Diego
Nov 7 – 28 · Nonstop
$172
-
Seattle → San Diego
Oct 25 – 30 · Nonstop
$188
-
Las Vegas → San Diego
Oct 8 – 10 · 1 stop
$254
-
Boston → San Diego
Oct 2 – 7 · Nonstop
$314
Cheapest month to fly to San Diego
Lowest round trip per departure month, any of our cities| Month | Cheapest round trip |
|---|---|
| September 2026 | $502 from Portland |
| October 2026 | $33 from Phoenix (cheapest month) |
| November 2026 | $41 from San Francisco |
| December 2026 | $374 from Portland |
| January 2027 | $133 from Portland |
Cheapest dates to San Diego
Best date pair from each city-
Oct 21 – 24 from Phoenix · 3 nights$33Book
Frontier Airlines Nonstop -
Nov 10 – 12 from San Francisco · 2 nights$41Book
Frontier Airlines Nonstop
-
Nov 7 – 28 from Denver · 21 nights$172Book
Frontier Airlines Nonstop
-
Oct 25 – 30 from Seattle · 5 nights$188Book
Southwest Airlines Nonstop -
Oct 13 – 15 from Portland · 2 nights$238Book
Alaska Airlines 1 stop -
Oct 8 – 10 from Las Vegas · 2 nights$254Book
Alaska Airlines 1 stop
-
Oct 2 – 7 from Boston · 5 nights$314Book
Alaska Airlines Nonstop
Prices change often. The booking site shows the final price before you pay.
Things to do in San Diego
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Flights to San Diego: questions
Which city has the cheapest flights to San Diego?
Right now it's Phoenix: round trips from $33 (Oct 21 – 24, nonstop). Next cheapest: San Francisco from $41 and Portland from $133. We compare 7 departure cities.
What is the cheapest month to fly to San Diego?
October 2026: the cheapest round trip we have found departing that month is $33. The most expensive month in our data is September, where the cheapest round trip is $502. Based on the 5 months ahead we track.
Are there nonstop flights to San Diego?
Yes. We have found nonstop round trips from Phoenix, San Francisco, Denver and Seattle. The cheapest is $33 from Phoenix.
More of United States
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Popular destinations
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About these prices
We track round-trip economy fares to San Diego (United States) from the cities listed above using Travelpayouts / Aviasales data, and refresh every route about once a day. The cheapest round trip we've found is $33 from Phoenix. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.