In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

How far in advance should I book a flight from Trenton, New Jersey to San Francisco?

Find a great deal and save up to 72% by booking at least 38 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Trenton, New Jersey to San Francisco within the next two weeks, with the cheapest ticket starting at $475.

What is the cheapest month to fly from Trenton, New Jersey to San Francisco?

Flights from Trenton, New Jersey to San Francisco lean towards being more expensive in December. Prices are generally better when you fly from Trenton, New Jersey to San Francisco in February, with the cheapest ticket starting at $169.

What is the cheapest time of day to fly from TTN to SFO?

When flying from Trenton, New Jersey to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?

Yes. In addition to deals on Trenton to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Trenton to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to San Francisco.

Can I find deals for business class flights from Trenton to San Francisco?

Yes. Cheapflights offers flight deals from Trenton to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$109+ Flights from Trenton, NJ to San Francisco

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Cheap flight deals from Trenton to San Francisco

Round-trip from	$249 (Priceline)
One-way from	$109 (CheapOair)
Popular in	December
Cheapest in	February
Average price	$457

From Trenton-Mercer to San Francisco

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One-way flight from Trenton-Mercer to San Francisco

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Highest demand for flights based on searches. 5% potential increase in price ($24 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Cheapest flights from Trenton to San Francisco
Explore the most affordable flight options available from Trenton to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Mon 7/1412:48 pmTTN - SFO

1 stop11h 35mFrontier

Thu 7/1710:29 pmSFO - TTN

1 stop9h 53mFrontier

Deal found 7/2

$249

Best flights from Trenton to San Francisco
Discover carefully curated flight deals from Trenton to San Francisco that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Mon 7/1412:48 pmTTN - SFO

1 stop11h 35mFrontier

Thu 7/1710:29 pmSFO - TTN

1 stop9h 53mFrontier

Deal found 7/2

$249

Last-minute flights from Trenton to San Francisco
Discover last-minute flight deals from Trenton to San Francisco. Data last updated July 3, 2025 and is based on user searches.

Wed 7/98:30 amTTN - SFO

1 stop28h 55mFrontier

Tue 7/158:53 pmSFO - TTN

1 stop24h 06mFrontier

Deal found 6/30

$312

Mon 7/1412:48 pmTTN - SFO

1 stop11h 35mFrontier

Thu 7/1710:29 pmSFO - TTN

1 stop9h 53mFrontier

Deal found 7/2

$249

One-way flights from Trenton to San Francisco
Search for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Wed 7/308:30 amTTN - SFO

1 stop28h 55mFrontier

Deal found 6/30

$109

Cheapflights Fare Finder

Use the filters below to find and compare flights from Trenton to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TrentonSan Francisco

TTN - SFO

TTNSFO

Trenton-Mercer

Mon 7/14

12:48 pm-9:23 pm

1 stop11h 35m

San Francisco

Thu 7/17

10:29 pm-11:22 am

1 stop9h 53m

$249

TrentonSan Francisco

TTN - SFO

TTNSFO

Trenton-Mercer

Wed 7/30

8:30 am-10:25 am

1 stop28h 55m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from Trenton to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Trenton with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Trenton to San Francisco

What is the cheapest month to book a flight from Trenton, New Jersey to San Francisco?

Currently, January is the cheapest month in which you can book a flight from Trenton, New Jersey to San Francisco (average of $276). Flying from Trenton, New Jersey to San Francisco in June is currently the most expensive (average of $360). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing San Francisco

Peruse reviews from past customers who have flown with Frontier from Trenton to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Frontier

5.9

Fair

3,286 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Jun 2025

TTN - TPA

TTN is a small airport for Frontier. Drop off is easy as is parking. The location is remote so there is zero traffic. The place could use a renovation but for the price you pay it is not necessary. Good-Staff is very friendly. Flight left on time. Bad- run down, deplaning/boarding on the tarmac. I got wet on the stairs outside of the plane while waiting to board.

Frontier

5.9

Fair

3,286 reviews

Frontier

5.9

Fair

3,286 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Jun 2025

TTN - TPA

Related info for your journey

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?
Yes. In addition to deals on Trenton to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Trenton to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to San Francisco.
Can I find deals for business class flights from Trenton to San Francisco?
Yes. Cheapflights offers flight deals from Trenton to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Trenton, New Jersey to San Francisco?
Currently, January is the cheapest month in which you can book a flight from Trenton, New Jersey to San Francisco (average of $276). Flying from Trenton, New Jersey to San Francisco in June is currently the most expensive (average of $360). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$109+ Cheap flights from Trenton, NJ to San Francisco (TTN - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/30. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Trenton to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Trenton to San Francisco

Round-trip from

One-way from

Popular in

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Find flight deals from Trenton to San Francisco

Cheapest flights from Trenton to San FranciscoExplore the most affordable flight options available from Trenton to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Explore the most affordable flight options available from Trenton to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Trenton to San Francisco that are best for you.

Best time to book a flight from Trenton to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Trenton with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Trenton to San Francisco

What is the cheapest month to book a flight from Trenton, New Jersey to San Francisco?

Reviews of airlines servicing San Francisco

Peruse reviews from past customers who have flown with Frontier from Trenton to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Trenton to San Francisco. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?

How can I find direct flights from Trenton to San Francisco?

Can I find deals for business class flights from Trenton to San Francisco?

What is the cheapest month to book a flight from Trenton, New Jersey to San Francisco?

Traveling to a place near Trenton?

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Cheapest flights from Trenton to San Francisco
Explore the most affordable flight options available from Trenton to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.