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prices we've seen · United States fares · USD

Flights from Philadelphia (PHL) to San Francisco (SFO)

  • One way from $138
  • Round trip from $289
  • Nonstop on 5 of 5 dates
  • Fastest 6h 25m
  • 3 airlines

The cheapest one-way fare from Philadelphia (PHL) to San Francisco (SFO) we have seen is $138 USD, departing Dec 5, 2026 (seen Nov 4, 2026): Frontier F9 2551, 1 stop, 11h 23m.

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Prices are the fare alone; the seller shows the bag and fare rules.

Cheapest by month

Checked Nov 11

Pick a month to search the day its cheapest fare leaves.

  1. Nov 2026$203
  2. Dec 2026$138
  3. Jan 2027$258

Cheapest days to fly one wayCheapest round trips

Each day's cheapest fare we've seen, nonstop and with stops. Cheapest first.

We may earn a commission from the seller · How we rank

  1. SatDec 5

    07:15

    11h 23m1 stop

    15:38

    Cheapest$138 USD

    Frontier F9 2551 · seen Nov 4

    Go to seller — $138

  2. SunDec 6

    20:35

    25h 56m3 stops

    19:31+1

    $202 USD

    Frontier F9 2269 · seen Nov 4

    Go to seller — $202

  3. WedNov 18

    08:30

    12h 40m1 stop

    18:10

    $203 USD

    Frontier F9 2297 · seen Nov 8

    Go to seller — $203

  4. WedNov 18

    08:10

    6h 25mNonstop

    11:35

    $232 USD

    American Airlines AA 2407 · seen Nov 8

    Go to seller — $232

  5. MonDec 28

    19:52

    14h 47m1 stop

    07:39+1

    $240 USD

    Frontier F9 2809 · seen Nov 4

    Go to seller — $240

  6. SunDec 6

    08:10

    6h 39mNonstop

    11:49

    $328 USD

    American Airlines AA 3035 · seen Nov 4

    Go to seller — $328

  7. SatDec 5

    08:40

    6h 39mNonstop

    12:19

    $333 USD

    American Airlines AA 3035 · seen Nov 4

    Go to seller — $333

  8. MonDec 28

    18:37

    6h 33mNonstop

    22:10

    $386 USD

    American Airlines AA 1826 · seen Nov 4

    Go to seller — $386

  9. FriJan 1

    09:50

    10h 16mNonstop

    17:06

    $418 USD

    United UA 1811 · seen Nov 10

    Go to seller — $418

The cheapest round trips we've seen on this route, on any dates, cheapest first.

We may earn a commission from the seller · How we rank

  1. 10 nightsNov 20–30

    21:55

    SFO

    Cheapest$289 USD

    Frontier F9 1601 · 2 stops · 35h 13m in all, both ways · seen Nov 10

    Go to seller — $289

  2. 3 nightsJan 1–4

    17:15

    SFO

    $336 USD

    Frontier F9 1601 · 2 stops · 33h 7m in all, both ways · seen Nov 5

    Go to seller — $336

  3. 37 nightsDec 11 – Jan 17

    18:31

    SFO

    $352 USD

    Frontier F9 1147 · 4 stops · 71h 45m in all, both ways · seen Nov 8

    Go to seller — $352

  4. 4 nightsDec 31 – Jan 4

    19:52

    SFO

    $359 USD

    Frontier F9 2809 · 2 stops · 22h 42m in all, both ways · seen Nov 4

    Go to seller — $359

  5. 2 nightsJan 2–4

    19:52

    SFO

    $363 USD

    Frontier F9 2809 · 2 stops · 30h 30m in all, both ways · seen Nov 5

    Go to seller — $363

  6. 3 nightsJan 2–5

    19:52

    SFO

    $378 USD

    Frontier F9 2809 · 4 stops · 63h 5m in all, both ways · seen Nov 5

    Go to seller — $378

  7. 9 nightsNov 20–29

    21:55

    SFO

    $382 USD

    Frontier F9 1601 · 2 stops · 25h 24m in all, both ways · seen Nov 9

    Go to seller — $382

  8. 37 nightsDec 11 – Jan 17

    18:43

    22:17

    $423 USD

    American Airlines AA 1826 · Nonstop · 11h 55m in all, both ways · seen Nov 8

    Go to seller — $423

  9. 5 nightsNov 25–30

    21:55

    SFO

    $429 USD

    Frontier F9 1601 · 2 stops · 33h 4m in all, both ways · seen Nov 9

    Go to seller — $429

  10. 7 nightsMar 10–17

    08:50

    12:18

    $457 USD

    American Airlines AA 2407 · Nonstop · 11h 48m in all, both ways · seen Nov 8

    Go to seller — $457
Show 7 more fares

  1. 10 nightsNov 20–30

    06:00

    09:22

    $466 USD

    United UA 2661 · Nonstop · 11h 41m in all, both ways · seen Nov 10

    Go to seller — $466

  2. 3 nightsJan 1–4

    10:35

    14:07

    $472 USD

    American Airlines AA 3035 · Nonstop · 11h 48m in all, both ways · seen Nov 5

    Go to seller — $472

  3. 4 nightsDec 31 – Jan 4

    11:02

    14:34

    $478 USD

    American Airlines AA 3035 · Nonstop · 11h 48m in all, both ways · seen Nov 4

    Go to seller — $478

  4. 5 nightsNov 25–30

    10:37

    14:10

    $557 USD

    American Airlines AA 3035 · Nonstop · 11h 50m in all, both ways · seen Nov 9

    Go to seller — $557

  5. 9 nightsNov 20–29

    18:21

    21:43

    $571 USD

    United UA 225 · Nonstop · 11h 41m in all, both ways · seen Nov 9

    Go to seller — $571

  6. 3 nightsJan 2–5

    15:45

    19:14

    $653 USD

    American Airlines AA 3079 · Nonstop · 11h 45m in all, both ways · seen Nov 5

    Go to seller — $653

  7. 2 nightsJan 2–4

    15:45

    19:14

    $657 USD

    American Airlines AA 3079 · Nonstop · 11h 45m in all, both ways · seen Nov 5

    Go to seller — $657

Compare other routes

Compared with Philadelphia → San Francisco: $138 one way (Dec 5).

The way back

Other places from Philadelphia

Every route from Philadelphia →

To San Francisco from other cities

Every route to San Francisco →

Airlines seen on this route

  • American Airlines
  • Frontier
  • United

Marketing carriers; the operating airline is shown by the seller.

Philadelphia to San Francisco in numbers

  • By month, Dec 2026 is the cheapest we've seen at $138 USD and Jan 2027 the most expensive at $258 USD — a spread of 87%.
  • Nonstop fares were seen on 5 of the 5 departure dates; carriers seen: American Airlines, Frontier, United.
  • PHL serves Philadelphia, United States; SFO serves San Francisco, United States.
  • San Francisco runs 3 hours behind Philadelphia.

Questions

What is the cheapest fare from Philadelphia (PHL) to San Francisco (SFO)?

The cheapest one-way fare from Philadelphia (PHL) to San Francisco (SFO) we have seen is $138 USD, departing Dec 5, 2026 (seen Nov 4, 2026): Frontier F9 2551, 1 stop, 11h 23m.

Is there a nonstop flight from Philadelphia (PHL) to San Francisco (SFO)?

Nonstop fares were seen on 5 of the 5 departure dates; carriers seen: American Airlines, Frontier, United.

Which month is cheapest to fly from Philadelphia (PHL) to San Francisco (SFO)?

By month, Dec 2026 is the cheapest we've seen at $138 USD and Jan 2027 the most expensive at $258 USD — a spread of 87%.

How old is this price?

It is the cheapest fare we've seen for that date; the date beside it is the day it was seen, or our last check. We look again at least once a day for the routes people search, and stop showing a route's prices two days after our last look. The seller's page shows the price right now.

How does a2bflight rank results?

By price and duration only; commission never enters the order. Cheapest means cheapest among the fares we've seen for this route. A click that books may earn a2bflight a commission from the seller; the price you see is the seller's own. See how we rank and what we keep.