United San Francisco-Charleston flights: 2027 guide

United plans to start seasonal nonstop flights between San Francisco International Airport (SFO) and Charleston International Airport (CHS) on March 28, 2027. The route is scheduled for Monday, Thursday, Friday and Sunday, using a Boeing 737-800 or 737 MAX 8.

The announcement does not include flight numbers, departure times or the final date of the season. Travelers should search the exact date on United and confirm that the result says nonstop before committing to a hotel, car or separate connection.

*Original AI-generated OpenSim editorial image. The unbranded aircraft and composite coastal landscape are illustrative, not a photograph of the planned route or a future flight.*

The practical answer: United says SFO-CHS service will begin Sunday, March 28, 2027, then operate four days each week as a seasonal route. Times and flight numbers were still absent from the airport announcement when this guide was checked. Use United's date-specific booking result, and keep a buffer around any separate ticket or fixed event.

This guide was checked on October 23, 2026.

The route starts in March with four weekly flights

Charleston International Airport's announcement gives the core operating plan. This is a future route, not a service that passengers can use today.

The Sunday start fits the published operating pattern. After launch day, the four-day schedule leaves gaps on Tuesday, Wednesday and Saturday. That matters if a delay or cancellation affects the only nonstop on a travel day.

United's San Francisco to Charleston fare page can also return connecting itineraries. Read the stops field before paying. A United result between the same cities is not automatically the new nonstop.

Booked travelers should use the itinerary, not the announcement

The airport release establishes the plan, but an issued ticket controls the trip. Confirm the flight number, local departure time, arrival date, operating carrier and aircraft in My Trips. Schedule and aircraft changes remain possible before a route begins.

If United changes the itinerary, review the options attached to the reservation before cancelling it yourself. A voluntary cancellation can have different fare consequences from an airline-initiated change. Travelers who book through an agency or another airline may need that ticket issuer to process a change.

Avoid separate tickets that depend on the SFO-CHS flight operating exactly as planned. A delay on one booking does not normally make a separate airline responsible for the next booking. If separate tickets are unavoidable, allow time to collect and recheck bags, clear security again where required, and recover from a missed connection.

Check the fare before planning the bags

United's carry-on guide allows a carry-on bag up to 9 by 14 by 22 inches and a personal item up to 9 by 10 by 17 inches on most fares. Domestic Basic Economy is the important exception for many travelers.

On this domestic route, a standard Basic Economy ticket generally includes one personal item but not a full-size carry-on. United lists exceptions for eligible status, cards and other qualifying travelers. The Basic Economy page and the allowance shown during checkout are better guides than an old fee quoted in a forum.

Keep medication, identification, keys, spare batteries and essential electronics in the personal item. A Boeing 737-800 and a 737 MAX 8 do not have identical seat maps, and the planned aircraft can change.

SFO construction changes the easiest path to United

SFO lists United domestic flights in Terminals 2 and 3. The airport's United page is the right place to check the current terminal rather than assuming every domestic departure uses Terminal 3.

Construction is changing some routes through the airport. SFO's getting around guide says the Terminal 3 AirTrain station is closed until a new facility opens in 2027. United passengers using AirTrain should use the combined Terminals 2 and 3 station while that notice remains in effect.

For downtown San Francisco, BART serves SFO from the International Terminal. AirTrain links the BART station with the domestic terminals. Check the current operating hours and trip planner, especially for an early departure or late arrival.

CHS has bus, taxi and app-based rides

Charleston International Airport places ground transportation outside baggage claim at the west end of the terminal. Its ground transportation page identifies separate areas for app-based rides, taxis, hotel shuttles, rental cars and public buses.

CARTA's Route 11 links the airport area with downtown Charleston. It can be useful for a traveler with a flexible arrival, but a timetable gap or long ride may not suit a late flight, a family carrying luggage or a fixed reservation. Check the live schedule for the travel date rather than relying on an old screenshot.

Reserve a rental car early if the trip continues beyond the Charleston peninsula. Downtown can be practical without a car, while beaches and spread-out Lowcountry stops often need a separate transport plan.

Leave airport time beyond the formal cutoff

United's airport process guide lists general domestic check-in cutoffs of 30 minutes without a checked bag and 45 minutes with one. Those are cutoffs, not recommended arrival targets. United advises arriving two hours before a domestic flight, with extra time when lines are busy.

Travelers aged 18 and over also need acceptable checkpoint identification. The TSA identification list should be checked before departure, particularly after the REAL ID enforcement and ConfirmID changes.

Mobile data for California and South Carolina

The live United States OpenSim eSIM can cover ground use in both California and South Carolina. The catalog showed 37 current United States packages on October 23, 2026, including fixed and daily data choices. Package allowances, fair-use terms and top-up eligibility can differ, so use the selected plan card as the source of truth.

Mobile data can help with United alerts, BART directions, a CARTA timetable or a ride pickup after landing. Install on reliable Wi-Fi and keep offline copies of the itinerary and accommodation address. An eSIM does not provide inflight service, protect a separate connection or replace the airline during a disruption.

Ten questions about United's SFO-CHS flights

When do United's San Francisco-Charleston flights start?

United and Charleston International Airport say the first flight is planned for March 28, 2027. Because the service is still months away, confirm the reservation again before paying for a fixed same-day activity.

Which days will the nonstop operate?

The announced days are Monday, Thursday, Friday and Sunday. There is no planned nonstop on Tuesday, Wednesday or Saturday in the initial pattern.

Is the SFO-CHS route year-round?

No. United describes it as seasonal. The airport announcement does not publish the final operating date, so search the intended date instead of assuming the route continues through winter.

Are tickets already on sale?

United has fare pages for both directions, but the public offer display did not establish a nonstop for every March 2027 date when this guide was checked. Search the exact date and verify the stops field before treating an itinerary as the new flight.

Has United published the flight numbers or times?

Neither detail appears in the airport announcement. Do not use an unofficial timetable as a firm plan. The issued United itinerary should show the current local times and flight number once the nonstop is loaded for the selected date.

Which aircraft will United use?

The announced plan names either a Boeing 737-800 or 737 MAX 8. The aircraft shown for a particular booking can change, so check the seat map again close to departure.

Does Basic Economy include a carry-on bag on this route?

Usually not. For a domestic United Basic Economy fare, most travelers receive one personal item and must check a larger carry-on for a fee. Eligible status or card benefits can change the allowance, so read the baggage line on the booking.

Which SFO terminal will the Charleston flight use?

SFO currently lists United domestic operations in Terminals 2 and 3. Check the United app and airport display on the day because the gate and terminal determine the easiest route through ongoing construction.

How can I get from Charleston airport to downtown?

Current choices include app-based rides, taxis, hotel shuttles, rental cars and CARTA Route 11. Compare the live bus timetable with the flight's arrival time and the amount of luggage before choosing.

What happens if the four-weekly flight is cancelled?

Review United's options in My Trips and ask about the next protected itinerary. With only four operating days each week, the replacement may connect through another United hub. Separate hotels, cars and tickets need their own flexible terms.

Recheck the timetable before departure

Recheck the United itinerary, baggage allowance, terminal and ground transport after the route is loaded and again before travel. This guide should be updated when United publishes flight numbers and times, identifies the final seasonal date, or begins operating the service.