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

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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 Greyhound US. To see the full timetable for all coaches just use or search and compare.

today
tomorrow
£22
Tuesday
Wednesday
Thursday
£20
Friday
£22
Saturday
£22

Cheapest bus trips tomorrow

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 3h 25m 15:25 Ontario, CA Montclair Place 18:50 San Diego Old Town Transit Center  Economy £22
Greyhound US 6h 10m 09:45 Ontario, CA Montclair Place 15:55 San Diego La Jolla Village  Economy £23
  • 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.
    • Greyhound US
      4h 10m
      0
      14:00
      Ontario, CA
      Montclair Place
      14:45
      San Bernardino, CA
      Greyhound Station
      0
      Greyhound US
      Economy
      £7
      • Waiting Time 0h 5m
    • FlixBus
      3h 20m
      0
      14:50
      San Bernardino, CA
      Crescent Wb Lt
      18:10
      San Diego
      Old Town Transit Center
      0
      FlixBus
      Economy
      £12
    Travel time is 0h 45m longer, but you will save £3

Cheapest bus trips Thursday

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 4h 10m 15:25 Ontario, CA Montclair Place 19:35 San Diego San Ysidro Transit Center  Economy £20
Greyhound US 8h 5m 03:55 Ontario, CA Montclair Place 12:00 San Diego San Ysidro Transit Center  Economy £25
Greyhound US 7h 25m 09:45 Ontario, CA Montclair Place 17:10 San Diego San Ysidro Transit Center  Economy £25

Cheapest bus trips Friday

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 4h 10m 15:25 Ontario, CA Montclair Place 19:35 San Diego San Ysidro Transit Center  Economy £22
Greyhound US 8h 5m 03:55 Ontario, CA Montclair Place 12:00 San Diego San Ysidro Transit Center  Economy £25
Greyhound US 7h 25m 09:45 Ontario, CA Montclair Place 17:10 San Diego San Ysidro 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.
    • Greyhound US
      4h 10m
      0
      14:00
      Ontario, CA
      Montclair Place
      14:45
      San Bernardino, CA
      Greyhound Station
      0
      Greyhound US
      Economy
      £7
      • Waiting Time 0h 5m
    • FlixBus
      3h 20m
      0
      14:50
      San Bernardino, CA
      Crescent Wb Lt
      18:10
      San Diego
      Old Town Transit Center
      0
      FlixBus
      Economy
      £12
    Travel time is the same as the direct connection, but you will save £3

Cheapest bus trips Saturday

Mode of Transport BertCompanyCountOneCompanyName Duration Departure time From Departure Arrival time To Destination Logo Seat classes Price
Greyhound US 3h 25m 15:25 Ontario, CA Montclair Place 18:50 San Diego Old Town Transit Center  Economy £22
Greyhound US 6h 30m 03:55 Ontario, CA Montclair Place 10:25 San Diego Seaport Village  Economy £25
Greyhound US 6h 10m 03:55 Ontario, CA Montclair Place 10:05 San Diego Old Town Transit Center  Economy £25
Greyhound US 5h 45m 03:55 Ontario, CA Montclair Place 09:40 San Diego La Jolla Village  Economy £25
Greyhound US 6h 10m 09:45 Ontario, CA Montclair Place 15:55 San Diego La Jolla 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.
    • Greyhound US
      4h 10m
      0
      14:00
      Ontario, CA
      Montclair Place
      14:45
      San Bernardino, CA
      Greyhound Station
      0
      Greyhound US
      Economy
      £7
      • Waiting Time 0h 5m
    • FlixBus
      3h 20m
      0
      14:50
      San Bernardino, CA
      Crescent Wb Lt
      18:10
      San Diego
      Old Town Transit Center
      0
      FlixBus
      Economy
      £12
    Travel time is 0h 45m longer, but you will save £3

Best Price Offer: The price for the cheapest coach from Ontario, CA to San Diego is £18 on 17/11/2026. 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.
Saturday is the busiest day, with more than 7 daily coaches from Ontario, CA to San Diego. Monday has instead the fewest connections, with only 2 daily coaches between Ontario, CA and San Diego.
The busiest time of the day is the Morning, with 5 coaches from Ontario, CA to San Diego, while Morning sees the fewest connections between Ontario, CA and San Diego, with 5 offers.

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

Compare all coach operators like Greyhound US that travel daily 3 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 3h 25m
Earliest Coach 09:45
Latest Coach 15:25
Daily Bus Connections 3 Ø
Distance 156.2 km
Coach Companies Greyhound US

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

Every day, 3 buses from 1 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 01/11/2026 and for the following days. Make sure get the cheapest bus ticket!

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday 26/10
Tuesday 27/10
Wednesday 28/10
Thursday 29/10
Friday 30/10
Saturday 31/10
Sunday 01/11
Monday 02/11
£19
Tuesday 03/11
Wednesday 04/11
£19
Thursday 05/11
£20
Friday 06/11
£18
Saturday 07/11
£19
Sunday 08/11
Monday 09/11
£25
Tuesday 10/11
£19
Wednesday 11/11
£19
Thursday 12/11
£24
Friday 13/11
Saturday 14/11
£22
Sunday 15/11
£21
Monday 16/11
£19
Tuesday 17/11
£18
Wednesday 18/11
£18
Thursday 19/11
£26
Friday 20/11
£26
Saturday 21/11
£21
Sunday 22/11

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, Friday is the cheapest day for a coach from Ontario, CA to San Diego. Thursday instead is the most expensive day with prices starting from £20.
Night is the cheapest day time for bus tickets from Ontario, CA to San Diego, with £18. Morning is the most expensive time of the day with prices starting from £23.

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 4h 10m. Compare offers and save money!

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

This connection is offered by 1 companies with ticket prices ranging from £18 to £29. 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 3 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 Greyhound US and takes 3h 25m. Coach tickets for this connection cost £22. 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 09:45. 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 15:25. 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 Greyhound US. 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: Greyhound US.

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.

How does CheckMyBus find the best coach deals from Ontario, CA to San Diego?

CheckMyBus collaborates directly with companies around the world to provide you with the best options when searching for a trip. We retrieve their first-hand data to show you real-time prices, schedules, and seat availability for 3 daily trips between Ontario, CA and San Diego. With the most up-to-date information from verified sources, you can fairly compare all available options and choose the trip that suits you best.

How does CheckMyBus technology work for trips from Ontario, CA to San Diego?

Prices and availability for 3 trips between Ontario, CA and San Diego change constantly. To provide you with the most up-to-date information, we connect directly with bus operators, Online Travel Agencies (OTAs), and Global Distribution Systems (GDS) via real-time interfaces (APIs). The data collected from these sources undergoes strict quality checks, is processed within our infrastructure, and is then presented to you on our search results pages. Visit our About Us page to learn more.

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

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!
Bus to Ontario, CA from Los Angeles Bus to Ontario, CA from Los Angeles
Coach from Bakersfield, CA to Ontario, CA Coach from Bakersfield, CA to Ontario, CA
Bus to Ontario, CA from El Monte, CA Bus to Ontario, CA from El Monte, CA
Fresno, CA to Ontario, CA bus Fresno, CA to Ontario, CA bus
Bus Seattle, WA to San Diego Bus Seattle, WA to San Diego
Bus to San Diego from Tulare, CA Bus to San Diego from Tulare, CA
Perris, CA to San Diego coach Perris, CA to San Diego coach
Ciudad Juárez to San Diego coach Ciudad Juárez to San Diego coach
Popular Airport Transfers to Ontario, CA and to San Diego
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