Cheap flights from St. Louis to San Diego from £73
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Not happy with the results? Try some of our useful filters
Search by stops
- Nonstop
- Up to 1 stop
- Up to 2 stops
Search by carrier
Search by price
Search by departure date
How much do flights to San Diego cost?
Cheapest one-way trip | £73 |
|---|---|
Cheapest round-trip | £153 |
Average round-trip | £344 |
Most popular airline | United Airlines |
Getting from San Diego airport to the city center
Fastest options: taxi or ride-hailing services. Best value: MTS Bus Route 992 and the San Diego Trolley.
Transport Option | Typical Time | Typical Cost | Frequency | Best For |
|---|---|---|---|---|
12-20 min | $2.50; single ride fare | every 15 min (traffic dependent) | budget travelers | |
25-40 min | $2.50 – $5; requires bus transfer at Old Town | every 15 min (traffic dependent) | connecting to trolley network | |
10-20 min | $15 – $25; metered; varies by traffic and destination | on-demand 24/7 (traffic dependent) | door-to-door convenience | |
10-20 min | $12 – $30; surge pricing may apply | on-demand 24/7 (traffic dependent) | app-based convenience | |
10-25 min | $30 – $60; pre-booked; varies by provider | by reservation (traffic dependent) | groups or pre-arranged travel | |
10-20 min | $40 – $100; daily rate; varies by provider and vehicle | on-demand (traffic dependent) | exploring San Diego region |
Notes:
- Prices in USD; table created in 2025 and subject to change.
- MTS Bus Route 992 operates between the airport and downtown via Old Town Transit Center.
- Taxis and ride-hailing services pick up at designated areas outside each terminal.
- Rental car facilities are located at the Rental Car Center, accessible via a free shuttle.
- We recommend checking official transport websites for your travel planning.
Updated: December 2025
Key info about flying to San Diego
Check-in for a flight from St. Louis to San Diego
| Name | Carrier code | IATA Code | Passport needed during booking |
|---|---|---|---|
| United Airlines | UAL | UA | No |
| Frontier Airlines | FFT | F9 | No |
| Alaska Airlines | ASA | AS | No |
| BREEZE | MX | No |
Online check-in is not available for these airlines.
Weather in San Diego
Average Weather
| Month | Average monthly max temperature | Average monthly min temperature |
| January | 18°C | 10°C |
| February | 17°C | 10°C |
| March | 18°C | 11°C |
| April | 19°C | 12°C |
| May | 20°C | 14°C |
| June | 22°C | 16°C |
| July | 24°C | 18°C |
| August | 25°C | 19°C |
| September | 25°C | 19°C |
| October | 23°C | 16°C |
| November | 21°C | 13°C |
| December | 17°C | 11°C |
14 day forecast
San Diego travel tips
Do you want to know more about prehistoric California in San Diego?
The San Diego Natural History Museum is considered the oldest of its kind in Southern California. The museum was opened in 1874 and is housed in a beautiful colonial-style building in Balboa Park. In the museum, you will find many exhibits that tell about the prehistoric era in California. You can study fossils, copies of living organisms, and bones of prehistoric animals.
What is the best public transportation to get around in San Diego?
Public transport in San Diego is represented by trams and buses. The tram line was launched in 1981 and became the first modern tram system in America. San Diego Trolley is represented by three lines (blue, orange, and green). The fare for buses and trams is the same – $2.5. The ticket is valid for 2 hours from the moment of the first change. Public transportation covers the entire city, including the San Diego suburbs, so you can easily reach every corner of the city.
Where to buy clothes at discounted prices in San Diego?
America is impossible without shopping! If you are looking for inexpensive but quality items, go shopping at outlets in San Diego. Here are a few malls to get started with: Carlsbad Premium Outlets, Viejas, Fashion Valley, and others.
Frequently asked questions
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