Which bus from Ontario, CA to San Diego is the cheapest?

Compare all coach companies and find the best price: Bus tickets from £18
Compare & Save Millions of buses in one click. Save up to 70%!
The Best Deals Save up to 70%
The Most Choices Millions of routes worldwide
Easy and Transparent Compare offers with 1 click

Which bus from Ontario, CA to San Diego is the best?

Check the bus schedule for Ontario, CA to San Diego. Here is a selection of the cheapest coach trips for the next days from bus operators like FlixBus, Greyhound US or Limousine Express. To see the full timetable for all coaches just use or search and compare.

today
£28
tomorrow
£27
Sunday
£25
Monday
£27
Tuesday
Wednesday
£26
Thursday
£25

Cheapest bus trips today

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 6h 15m 04:20 Ontario, CA Montclair Place 10:35 San Diego San Ysidro Transit Center  Economy £28
Greyhound US 7h 35m 09:35 Ontario, CA Montclair Place 17:10 San Diego San Ysidro Transit Center  Economy £28
Greyhound US 7h 45m 15:00 Ontario, CA Montclair Place 22:45 San Diego San Ysidro Transit Center  Economy £28
FlixBus 7h 45m 11:00 Ontario, CA Montclair Place 18:45 San Diego San Ysidro Transit Center  Economy £28
FlixBus 9h 10m 13:35 Ontario, CA Montclair Place 22:45 San Diego San Ysidro Transit Center  Economy £28

Cheapest bus trips tomorrow

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 7h 15m 15:00 Ontario, CA Montclair Place 22:15 San Diego Seaport Village  Economy £27
Greyhound US 6h 50m 09:35 Ontario, CA Montclair Place 16:25 San Diego Old Town Transit Center  Economy £27
Greyhound US 8h 50m 15:00 Ontario, CA Montclair Place 23:50 San Diego Old Town Transit Center  Economy £27
FlixBus 8h 40m 13:35 Ontario, CA Montclair Place 22:15 San Diego Seaport Village  Economy £27
FlixBus 9h 30m 04:40 Ontario, CA Montclair Place 14:10 San Diego Old Town Transit Center  Economy £27

Cheapest bus trips Sunday

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 5h 45m 04:20 Ontario, CA Montclair Place 10:05 San Diego Seaport Village  Economy £25
Greyhound US 7h 15m 15:00 Ontario, CA Montclair Place 22:15 San Diego Seaport Village  Economy £25
Greyhound US 7h 25m 04:20 Ontario, CA Montclair Place 11:45 San Diego Old Town Transit Center  Economy £25
FlixBus 5h 25m 04:40 Ontario, CA Montclair Place 10:05 San Diego Seaport Village  Economy £25
FlixBus 8h 40m 13:35 Ontario, CA Montclair Place 22:15 San Diego Seaport Village  Economy £25
  • Did you know that if you travel from Ontario, CA to San Diego via San Bernardino, CA, you can save more than £3? You can find the corresponding connections below.
    • FlixBus
      3h 35m
      0
      14:00
      Ontario, CA
      Montclair Place
      14:45
      San Bernardino, CA
      Greyhound Station
      0
      FlixBus
      Economy
      £6
      • Waiting Time 0h 5m
    • FlixBus
      2h 45m
      0
      14:50
      San Bernardino, CA
      John's Burger Flixbus Stop
      17:35
      San Diego
      La Jolla Village
      0
      FlixBus
      Economy
      £15
    Travel Time is 1h 50m shorter, and you will save £3

Cheapest bus trips Monday

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 5h 45m 04:20 Ontario, CA Montclair Place 10:05 San Diego Seaport Village  Economy £27
Greyhound US 7h 15m 15:00 Ontario, CA Montclair Place 22:15 San Diego Seaport Village  Economy £27
FlixBus 8h 40m 13:35 Ontario, CA Montclair Place 22:15 San Diego Seaport Village  Economy £27
FlixBus 5h 25m 04:40 Ontario, CA Montclair Place 10:05 San Diego Seaport Village  Economy £28
Limousine Express 8h 30m 06:00 Ontario, CA Convention Center 14:30 San Diego San Ysidro Transit Center  Basic £32
  • Did you know that if you travel from Ontario, CA to San Diego via San Bernardino, CA, you can save more than £5? You can find the corresponding connections below.
    • FlixBus
      3h 35m
      0
      14:00
      Ontario, CA
      Montclair Place
      14:45
      San Bernardino, CA
      Greyhound Station
      0
      FlixBus
      Economy
      £6
      • Waiting Time 0h 5m
    • FlixBus
      2h 45m
      0
      14:50
      San Bernardino, CA
      John's Burger Flixbus Stop
      17:35
      San Diego
      La Jolla Village
      0
      FlixBus
      Economy
      £15
    Travel Time is 1h 50m shorter, and you will save £5

Cheapest bus trips Wednesday

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 6h 50m 09:35 Ontario, CA Montclair Place 16:25 San Diego Old Town Transit Center  Economy £26
Greyhound US 6h 20m 09:35 Ontario, CA Montclair Place 15:55 San Diego La Jolla Village  Economy £26
Greyhound US 6h 45m 15:00 Ontario, CA Montclair Place 21:45 San Diego La Jolla Village  Economy £26
FlixBus 7h 10m 11:00 Ontario, CA Montclair Place 18:10 San Diego Old Town Transit Center  Economy £26
FlixBus 6h 35m 11:00 Ontario, CA Montclair Place 17:35 San Diego La Jolla Village  Economy £26
  • Did you know that if you travel from Ontario, CA to San Diego via San Bernardino, CA, you can save more than £4? You can find the corresponding connections below.
    • FlixBus
      3h 35m
      0
      14:00
      Ontario, CA
      Montclair Place
      14:45
      San Bernardino, CA
      Greyhound Station
      0
      FlixBus
      Economy
      £6
      • Waiting Time 0h 5m
    • FlixBus
      2h 45m
      0
      14:50
      San Bernardino, CA
      John's Burger Flixbus Stop
      17:35
      San Diego
      La Jolla Village
      0
      FlixBus
      Economy
      £15
    Travel Time is 2h 45m shorter, and you will save £4

Cheapest bus trips Thursday

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 9h 50m 04:20 Ontario, CA Montclair Place 14:10 San Diego Old Town Transit Center  Economy £25
Greyhound US 7h 25m 04:20 Ontario, CA Montclair Place 11:45 San Diego Old Town Transit Center  Economy £25
Greyhound US 6h 50m 09:35 Ontario, CA Montclair Place 16:25 San Diego Old Town Transit Center  Economy £25
FlixBus 7h 5m 04:40 Ontario, CA Montclair Place 11:45 San Diego Old Town Transit Center  Economy £25
FlixBus 9h 30m 04:40 Ontario, CA Montclair Place 14:10 San Diego Old Town Transit Center  Economy £25
  • Did you know that if you travel from Ontario, CA to San Diego via San Bernardino, CA, you can save more than £3? You can find the corresponding connections below.
    • FlixBus
      3h 35m
      0
      14:00
      Ontario, CA
      Montclair Place
      14:45
      San Bernardino, CA
      Greyhound Station
      0
      FlixBus
      Economy
      £6
      • Waiting Time 0h 5m
    • FlixBus
      2h 45m
      0
      14:50
      San Bernardino, CA
      John's Burger Flixbus Stop
      17:35
      San Diego
      La Jolla Village
      0
      FlixBus
      Economy
      £15
    Travel Time is 3h 15m shorter, and you will save £3

Best Price Offer: The price for the cheapest coach from Ontario, CA to San Diego is £18 on 18/12/2025. Flexible travellers save on ticket prices.


What is the best day and time to travel by bus between Ontario, CA and San Diego?

Here is the frequency of all coach connections from Ontario, CA to San Diego. See on which day of the week you have more travel options and what time you have more bus trips to choose from.
Monday is the busiest day, with more than 39 daily coaches from Ontario, CA to San Diego. Sunday has instead the fewest connections, with only 10 daily coaches between Ontario, CA and San Diego.
The busiest time of the day is the Night, with 45 coaches from Ontario, CA to San Diego, while Evening sees the fewest connections between Ontario, CA and San Diego, with 4 offers.

All facts for Ontario, CA to San Diego bus at a glance

Compare all coach operators like FlixBus, Greyhound US and Limousine Express that travel daily 19 times by bus from Ontario, CA to San Diego in one click. Book your Ontario, CA to San Diego bus ticket starting from £18!

Cheapest Bus £18
Fastest Bus 4h 0m
Earliest Coach 04:20
Latest Coach 15:00
Daily Bus Connections 19 Ø
Distance 156.2 km
Coach Companies FlixBus, Greyhound US and Limousine Express

What are the cheapest coach tickets from Ontario, CA to San Diego?

Every day, 19 buses from 3 coach companies leave Ontario, CA for San Diego. Check the table below to find the cheapest prices for coach tickets for this route, starting from 05/12/2025 and for the following days. Make sure get the cheapest bus ticket!

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday 01/12
Tuesday 02/12
Wednesday 03/12
Thursday 04/12
Friday 05/12
£31
Saturday 06/12
£32
Sunday 07/12
£25
Monday 08/12
£27
Tuesday 09/12
Wednesday 10/12
£26
Thursday 11/12
£26
Friday 12/12
£24
Saturday 13/12
£32
Sunday 14/12
Monday 15/12
Tuesday 16/12
£21
Wednesday 17/12
£20
Thursday 18/12
£18
Friday 19/12
£26
Saturday 20/12
£22
Sunday 21/12
£34
Monday 22/12
Tuesday 23/12
Wednesday 24/12
Thursday 25/12
Friday 26/12
Saturday 27/12
Sunday 28/12

The cheapest time to travel from Ontario, CA to San Diego

See here on which day and which time of the day you can find the cheapest bus ticket from Ontario, CA to San Diego, for the next 30 days.
With a price starting from £18, Thursday is the cheapest day for a coach from Ontario, CA to San Diego. Monday instead is the most expensive day with prices starting from £27.
Night is the cheapest day time for bus tickets from Ontario, CA to San Diego, with £18. Evening is the most expensive time of the day with prices starting from £32.

How to save money travelling from Ontario, CA to San Diego

Travel can be expensive, but it doesn't need to be! Do you want to avoid paying higher prices for your trip? Plan your bus trips smartly. Here are a few hacks to save money on your coach journey.

Book the ticket from Ontario, CA to San Diego in advance! The earlier you book, the cheaper usually the price is. Also, you will be sure to have a place on the coach from Ontario, CA to San Diego, compared instead if you buy it at the last moment, or directly at the station.

If you can, avoid travelling at peak times. Instead of weekend, try travelling during the week. Travelling in the evening or at night it’s also cheaper, and later coaches from Ontario, CA to San Diego are also emptier.

Check for bus deals and promotions for all bus companies in this route. On CheckMyBus we show special offers directly in the coach trip on our search. Sign-up and check or deals sections and get notifications on our latest travel hacks.

All bus stations and stops in Ontario, CA and San Diego

Here is a map with all coach stations in Ontario, CA and San Diego. Compare which stop is closest to your destination to save time to find the fastest buses and connections.

All you need to know when you travel by bus from Ontario, CA to San Diego

Check all information on comfort and services on the coaches from Ontario, CA to San Diego. Which seat classes are available or what are the amenities of operators on your coach trip? Below you´ll find answers to your questions.

FAQs for Ontario, CA to San Diego bus

How much does a Ontario, CA San Diego coach trip cost?

This depends on, among other things, the day and travel time. The cheapest ticket for the Ontario, CA San Diego bus trip is available from £18 and takes 7h 25m. Compare offers and save money!

How much could I save by comparing buses from Ontario, CA to San Diego?

This connection is offered by 3 companies with ticket prices ranging from £18 to £38. Therefore, we suggest booking your ticket as soon as possible to ensure you’ll get the cheapest bus trip to San Diego.

How many connections are available for the Ontario, CA San Diego route on average every day?

Each day, the bus route from Ontario, CA to San Diego is offered by roughly 19 busses. By using our search, you can compare bus schedules and find your ideal trip.

How long does a bus to San Diego from Ontario, CA take?

The quickest coach from Ontario, CA to San Diego is provided by Limousine Express and takes 4h 0m. Coach tickets for this connection cost £32. However, keep in mind that the connection can take longer due to traffic.

What time is the first bus from Ontario, CA to San Diego?

The earliest bus to San Diego departs from Ontario, CA at 04:20. In this context, information about departure times may differ on weekends and holidays. Simply use our search to find the exact times for your planned travel date.

What time is the last coach from Ontario, CA to San Diego?

The latest bus to San Diego departs from Ontario, CA at 15:00. Please note that departure times may differ on weekends and holidays. Simply use our search to find the exact times for your planned travel date.

Which bus companies serve the Ontario, CA San Diego route?

Passengers looking to travel from Ontario, CA to San Diego can travel with FlixBus, Greyhound US and Limousine Express. Compare all available bus tickets with our search to book the trip that works best for you.

Is there a direct bus between Ontario, CA and San Diego?

You can check all the direct connections between Ontario, CA and San Diego by using our search and looking at the Changes section in our filters. These are some of the companies which offer a direct bus: FlixBus, Greyhound US and Limousine Express.

What can I take with me on the bus to San Diego from Ontario, CA?

Depending on which provider you travel with, what you're allowed to bring with you can vary. Generally, you can take a suitcase and hand luggage with you on the bus for the Ontario, CA San Diego bus route free of charge. Simply use our search to find a coach that is best suited to your needs for your planned travel date.

What equipment is available for the Ontario, CA San Diego bus route?

The equipment on board differs depending on the provider. However, many long-distance buses have WiFi so you can tell your friends your exact location during the journey. To make travelling even more pleasant, air conditioning systems provide ventilation. It is best to use our search to get precise information about the equipment of the bus from Ontario, CA to San Diego on your planned travel date.

Available seat classes which are offered on the bus route Ontario, CA to San Diego

Basic
Basic

Name referring to the typical seat you will find with companies that don’t distinguish between different classes.

Economy
Economy

The cheapest option available for your ticket, it usually comes with reclinable seats and AC.

More bus routes to Ontario, CA and to San Diego

Here’s an overview of the most popular bus routes to Ontario, CA and to San Diego. Simply click on the connection of your choice, and you’ll find all the details about your bus route!
Coach from Phoenix, AZ to Ontario, CA Coach from Phoenix, AZ to Ontario, CA
Bus to Ontario, CA from Los Angeles Bus to Ontario, CA from Los Angeles
Buses San Jose, CA to Ontario, CA Buses San Jose, CA to Ontario, CA
Coaches Las Vegas to Ontario, CA Coaches Las Vegas to Ontario, CA
Bus Los Angeles to San Diego Bus Los Angeles to San Diego
Coaches Mexicali to San Diego Coaches Mexicali to San Diego
Coach from Anaheim, CA to San Diego Coach from Anaheim, CA to San Diego
Coach Monterrey, NL to San Diego Coach Monterrey, NL to San Diego
Popular Airport Transfers to Ontario, CA and to San Diego
CheckMyBus › Coaches in USA › Coach to Ontario, CA › Coach to San Diego

The CheckMyBus App

Free Download

App Store
CheckMyBus App
Close
GPDR CheckMyBus shield

We value your privacy!

To

show

you

the

best

bus

deals,

we

and

our

partners

use

technical,

analytical,

and

marketing

cookies

for

ads

personalisation.

We

remember

your

anonymized

details

to

provide

a

personalized

experience.