docs(trip): choose UA1333 / AC573 for MS & LK flights

9:47 AM out Sep 20 (lands SFO 12:11 PM), 7:30 PM back Oct 4. Book
via United, ~CA$1,470 all-in for 2 with one checked bag. Sep 20
becomes an afternoon-start SF day.

bookings/flights-ms.md

@@ -3,17 +3,16 @@
 LK flies with MS on both legs (YVR ↔ SFO). She leaves the group Sep 22
 and rejoins Sep 27 around 5 PM in LA.
 
+**Chosen — to book** (selected Aug 31, 2026; not purchased yet):
+
 ## Vancouver → San Francisco
 
 | | |
 |---|---|
 | **Route** | Vancouver (YVR) → San Francisco (SFO) |
 | **Date** | Sep 20, 2026 |
-| **Airline** | TBC |
-| **Flight** | TBC |
-| **Arrival time** | TBC — needed before finalizing the Sep 20 SF plan and rental pickup |
-
----
+| **Flight** | **UA1333** (United-operated, AC codeshare) |
+| **Times** | Depart 9:47 AM → arrive SFO **12:11 PM** |
 
 ## San Francisco → Vancouver
 
@@ -21,10 +20,15 @@ and rejoins Sep 27 around 5 PM in LA.
 |---|---|
 | **Route** | San Francisco (SFO) → Vancouver (YVR) |
 | **Date** | Oct 4, 2026 |
-| **Airline** | TBC |
-| **Flight** | TBC |
-| **Departure time** | TBC — coordinate with the SFO rental-car return |
+| **Flight** | **AC573** (Air Canada-operated, UA codeshare) |
+| **Times** | Depart 7:30 PM → arrive YVR 9:50 PM |
 
-**Tickets needed:** Round trip, YVR ↔ SFO, Sep 20–Oct 4, for MS and LK.
+**Booking:** through **United** (Economy, not Basic) — CA$1,370 for 2 + CA$100 one checked
+bag (fee covers the whole trip) ≈ **CA$1,470 all-in**. Free seat selection and changes,
+no refunds (refundable fare +CA$100/person). Prices checked Aug 31 — re-verify at checkout,
+and set passenger count to 2.
+
+**Consequence for Sep 20:** SFO arrival 12:11 PM → rental pickup ~1 PM; the Golden Gate /
+waterfront day starts mid-afternoon — trim the [Sep 20 plan](../itinerary.md) accordingly.
 
 **Not included:** No LA → Las Vegas flight is needed; that leg will be driven in the rental car.