F9 SFO flights in June 2026

F9 to SFO in June 2026

FareGlide grouped 5 cached F9 fare observations to SFO in June 2026 across 4 origins. The lowest cached origin is Cleveland (CLE) from $144 on Jun 9, 2026. This is carrier-destination-month research context, not live inventory.

Destination: San Francisco (SFO)
Airline: Frontier Airlines (F9)
Month: June 2026
Cached low: $144
Origins: 4
Stop mix: 5 connecting

June 2026 F9 origins to SFO

Use these rows to choose a departure airport before opening current partner results. If the live airline filter is weak, widen to all carriers before changing the travel month.

Cleveland (CLE) to San Francisco (SFO) $144 cached low / 1 sample / 1 stop

Open route-airline page Check current fares

Kansas City (MCI) to San Francisco (SFO) $185 cached low / 2 samples / 1 stop

Open route-airline page Check current fares

Raleigh-Durham (RDU) to San Francisco (SFO) $197 cached low / 1 sample / 1 stop

Open route guide Check current fares

Indianapolis (IND) to San Francisco (SFO) $215 cached low / 1 sample / 1 stop

Open route guide Check current fares

Destination-airline-month recheck plan

This plan keeps destination, airline, and month fixed first, then decides whether the origin, stop filter, or live provider dates should move.

Destination-airline-month lock

SFO + F9 in June 2026

Keep SFO, F9, and June 2026 fixed first, then compare origin rows before changing filters.

Lowest cached origin

Cleveland from $144

Start with Jun 9, 2026 on CLE to SFO, then compare nearby weekdays.

Evidence depth

5 samples / 4 routes

4 origins have cached F9 context to SFO in June 2026. Treat it as a recheck queue.

Stop filter

5 connecting samples

If live airline-filtered results are thin, widen to all carriers before changing the month.

Carrier-destination-month decision brief

Use this brief when Frontier Airlines, SFO, and June 2026 are all part of the search hypothesis.

Carrier-destination-month move

F9 to SFO after the June 2026 check

Start with the full SFO June 2026 origin shortlist, then apply Frontier Airlines if current inventory is broad enough.

Carrier-destination evidence

5 cached samples

This is narrower than the full F9 to SFO page, which has 6 cached samples across all sampled dates.

Main carrier-destination risk

Carrier filter can thin results

If the live airline filter returns weak results, widen to all carriers before changing the origin.

Best destination follow-up

Frontier Airlines to SFO

Compare against the broader carrier-destination page from $144 before treating this month as the best airline window.

Connected carrier-destination research

All F9 origins to SFO 4 cached origins / $144 low All airlines to SFO 2 cached airline codes Cheap flights to SFO Destination-first origin ideas and fare context Frontier Airlines airline hub Carrier-level cached fare context

F9 to SFO in June 2026 questions

Are F9 fares to SFO in June 2026 live on this page?

No. FareGlide uses cached fare observations to build the origin shortlist. Confirm current schedules, inventory, baggage, seat, and booking rules with the partner provider.

Which F9 origin to SFO looked cheapest in June 2026?

CLE to SFO had the lowest cached sample at $144 on Jun 9, 2026.

How many cached samples support this F9 destination-month page?

FareGlide grouped 5 cached fare samples across 4 route rows for June 2026.