EDIT as of 0630GMT: Original update highlighting frequency changes from week 32, which should be read as week 29 (although majority of changes are not affected due to misplacement of calendar week)
Published at 0200GMT 26NOV24

Air Canada last week filed various service changes to the US, for Northern summer 2025 season from 01MAY25.

Following routes will be cancelled:
Montreal – New Orleans Planned 3 weekly Embraer E175 service cancelled
Toronto – Baltimore/Washington Planned 1 daily CRJ900 service resumption from 01MAY25 cancelled
Toronto – Hartford Planned 1 daily CRJ900 service resumption from 01MAY25 cancelled
Toronto – Kansas City Planned 1 daily CRJ900 service resumption from 31MAY25 cancelled
Toronto – Portland OR Planned 1 daily rouge A319 cancelled, previously scheduled 14MAY25 – 31AUG25

Air Canada will no longer serve Baltimore/Washington, Hartford and Kansas City with these cancellations.

Other service changes, based on schedule listing comparison 06OCT24 vs 24NOV24, for flights between 01MAY25 and 25OCT25. Note some of these changes are largely identical to frequencies for July/August 2024:
Montreal – Detroit eff 01MAY25 Reduce from 2 to 1 daily, CRJ900
Montreal – Fort Lauderdale eff 04MAY25 Increase from 14 to 15 weekly (17 weekly 16JUN25 – 28AUG25), rouge A321
Montreal – Las Vegas 01JUL25 – 01SEP25 Reduce from 2 to 1 daily, rouge A319
Montreal – Minneapolis/St. Paul eff 01MAY25 Reduce from 2 to 1 daily, CRJ900
Montreal – Phoenix eff 12JUN25 Increase from 6 to 7 weekly, A220 (rouge A319 from 01AUG25, rouge A321 from 02SEP25)
Montreal – San Francisco 01MAY25 – 30JUL25 Reduce from 3 to 2 daily, 737 MAX 8 replaces A220 on all flights (AC previously scheduled 2 daily from 01AUG25)
Toronto – Charlotte eff 01MAY25 Reduce from 21 to 20 weekly, Embraer E175
Toronto – Cincinnati eff 01MAY25 Reduce from 20 to 14 weekly, CRJ900
Toronto – Cleveland eff 01MAY25 Reduce from 21 to 20 weekly, Embraer E175
Toronto – New Orleans eff 01MAY25 Increase from 4 to 5 weekly, rouge A319
Toronto – Philadelphia eff 01MAY25 Increase from 20 to 21 weekly, Embraer E175/A220-300
Toronto – Phoenix eff 01MAY25 Increase from 1 to 2 daily, rouge A319/320 (rouge A320 only from 01JUL25, rouge A320/321 from 01AUG25)
Toronto – Sacramento eff 15JUN25 Reduce from 5 to 4 weekly, A220-300 (Previously scheduled as 5 weekly from 14MAY25. Planned 4 weekly from 03SEP25 unchanged)
Toronto – San Francisco eff 01MAY25 Reduce from 5 to 4 daily. Service moves from A220/737 MAX 8 to 3 daily 737 MAX 8 and 1 daily A330-300
Toronto – Seattle eff 01MAY25 Reduce from 2 to 1 daily, 737 MAX 8 replaces A220-300
Vancouver – Houston eff 01MAY25 Reduce from 7 to 6 weekly, 737 MAX 8
Vancouver – Miami eff 01MAY25 Increase from 3 to 4 weekly, 737 MAX 8
Vancouver – Washington Dulles eff 01MAY25 Reduce from 7 to 5 weekly, 737 MAX 8

Based on comparison week 29 in 2024 (14-20JUL24) vs 2025 (13-19JUL25), other notable changes include the following:
Montreal – Denver Increase from 7 to 14 weekly
Montreal – Nashville Increase from 4 to 14 weekly
Montreal – New York LaGuardia Increase from 48 to 49 weekly
Montreal – Raleigh/Durham Increase from 7 to 14 weekly
Montreal – San Francisco Increase from 13 to 14 weekly
Montreal – Tampa Increase from 3 to 7 weekly
Toronto – Boston Increase from 28 to 35 weekly
Toronto – Charleston SC Reduce from 7 to 5 weekly
Toronto – Chicago O'Hare Increase from 28 to 42 weekly
Toronto – Cleveland Reduce from 7 to 5 weekly
Toronto – New York LaGuardia Increase from 76 to 77 weekly
Toronto – Philadelphia Increase from 20 to 21 weekly
Toronto – Phoenix Increase from 11 to 14 weekly
Toronto – Raleigh/Durham Reduce from 21 to 20 weekly
Toronto – San Diego Reduce from 14 to 7 weekly
Toronto – Tampa Increase from 7 to 14 weekly
Vancouver – Austin Increase from 3 to 4 weekly