Flights Montréal → Key West
As of November 2026, economy flights from Montréal to Key West have a typical range CAD 630–2019, median CAD 883. Full range across all 85 offers: CAD 479–3582. We analyzed 85 offers from 10 airlines in a single price check.
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Montréal → Key West
Based on 85 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Montréal → Key West
Add-on pricing from the cheapest available offer per airline · November 2026 · CAD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| American Airlines | — | CAD 55 | — |
| Delta | — | CAD 45 | — |
| United | — | CAD 151 | — |
| United | — | — | — |
| WestJet | — | CAD 73 | — |
| Air Canada | — | CAD 39 | — |
| American | — | CAD 50 | — |
| Porter Airlines | — | — | — |
| Air Canada | — | — | — |
| Delta | — | CAD 34 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Montréal to Key West cost?
Based on 85 offers · November 2026
Montréal to Key West flights ranged from CAD 479 to CAD 3582 across 85 offers analyzed in November 2026. The chart below shows how prices distributed across all 85 offers.
These 85 offers (November 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between CAD 713 and CAD 1068
What hidden fees do Montréal to Key West flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Montréal to Key West routes. The breakdown below is based on 85 offers analyzed in November 2026.
| Carrier | Avg fee (CAD) | % of base fare |
|---|---|---|
| AA | 17 | 2% |
| DL | 25 | 3% |
| United | 151 | 30% |
| UA | 11 | 1% |
| WS | 34 | 4% |
| Air Canada | 43 | 5% |
| American | 50 | 6% |
| PD | 12 | 2% |
| AC | 13 | 1% |
| Delta | 34 | 4% |
United: base ~CAD 360 + fees CAD 151 = ~CAD 511 total. United Airlines: base ~CAD 852 + fees CAD 11 = ~CAD 863 total.
United's CAD 151 ancillary fees narrow the gap with United Airlines's lower-fee model — the CAD 492 base difference shrinks to CAD 352 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Montréal to Key West?
10 airlines flew Montréal to Key West in this dataset. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
| Airline | Offers | Typical range (CAD) | Median (CAD) | Fees (CAD) |
|---|---|---|---|---|
 United | 1 | — | 511 | 151 (30%) |
 Porter Airlines | 2 | 702–718 | 710 | 12 (2%) |
 Delta Air Lines | 14 | 555–967 | 728 | 25 (3%) |
 American | 13 | 666–1068 | 817 | 50 (6%) |
 Delta | 2 | 718–919 | 819 | 34 (4%) |
 United Airlines | 7 | 593–1584 | 863 | 11 (1%) |
 WestJet | 14 | 713–1414 | 872 | 34 (4%) |
 Air Canada | 3 | 679–880 | 876 | 43 (5%) |
 American Airlines | 14 | 594–1092 | 934 | 17 (2%) |
 Air Canada | 15 | 995–3474 | 3221 | 13 (0%) |
Where do the best Montréal → Key West prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Montréal to Key West flights
- Full-service carriers on Montréal–Key West cost 1.2x more than budget airlines (CAD 1053 vs CAD 872 median; overall median CAD 883).
- United charges 14.2x more in ancillary fees than UA — CAD 151 vs CAD 11 avg per booking.
- The same route priced CAD 494 apart depending on where it was booked — the lowest median was CAD 735. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Montréal to Key West cost?
- Based on 85 offers analyzed, Montréal to Key West flights range from CAD 479 to CAD 3582, with a median price of CAD 883. Search for your specific dates →
- What hidden fees should I expect on Montréal to Key West flights?
- On average, ancillary fees (bags, seat selection) add CAD 27 to the base fare on Montréal to Key West flights. See itemized fees for your itinerary →
- Which airline is cheapest on Montréal to Key West including all fees?
- United has the lowest median fare on Montréal to Key West at CAD 511 (median across 1 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Montréal–Key West flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was CAD 735. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Montréal to Key West routes?
- Montréal to Key West has 10 airlines competing, creating a price range from CAD 479 to CAD 3582 across 85 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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