What is the best way to book domestic flights in Canada?
For flights within Canada, the choice is really between full-service carriers (Air Canada and WestJet), the premium-feel regional Porter, and the ultra low-cost airlines Flair and Lynx. Book about 6–8 weeks ahead, fly mid-week, and watch the budget carriers’ baggage fees, which can erase the saving on the base fare. Canada is a big, thin market, so prices swing hard with demand — the traveller who plans wins.
Whether you are crossing the country from Toronto to Vancouver or hopping Toronto to Montreal, the same principles apply, but the right airline changes with the route and what you value. This guide compares the carriers, works through a real fare example, and points you to the deals.
| Airline | Type | Best for | Watch out for |
|---|---|---|---|
| Air Canada | Full-service | Widest network, Aeroplan | Premium pricing on peak routes |
| WestJet | Full-service | Value, strong in the West | Thinner Eastern network |
| Porter | Premium feel | Comfort on Eastern routes | Limited Western coverage |
| Flair / Lynx | Ultra low-cost | Lowest base fares | Fees for bags & seats |
Worked example: Toronto to Vancouver on a budget
A Flair fare might advertise at CAD 129 one-way against CAD 220 on Air Canada. Travelling with just a backpack, the budget fare genuinely wins. Add a checked bag (around CAD 50 each way) and a chosen seat (CAD 20), though, and you are near CAD 200 — close enough to the full-service fare that the free carry-on, loyalty points and schedule flexibility may tip the balance. The rule of thumb: budget for light, short trips; full-service when you carry bags or value flexibility. We compare the majors head-to-head in WestJet vs Air Canada, and the wider field in the best airlines for flying within Canada.
Choosing your airline
Porter has carved out a loyal following for its free snacks, no middle seats on its jets, and roomier feel — the details are in our Porter Airlines guide — while the ultra-low-cost world is best understood through our Flair Airlines review, which is honest about both the savings and the trade-offs.
Finding the cheapest domestic fares
Timing and route choice do most of the work. Our guide to the best time to book domestic flights pins down the window, the cheapest domestic routes shows where the deals concentrate, and if your plans are sudden, cheap last-minute domestic flights covers your options. For the complete overview, see our domestic flights in Canada guide.
Popular routes, city by city
We have route-level guides with airlines, prices and timing for Toronto to Vancouver, Toronto to Calgary, Toronto to Montreal, Toronto to Edmonton, Toronto to Halifax, Calgary to Vancouver, and Montreal to Vancouver — handy when you want specifics rather than general advice.
Related guides
Sharpen your savings with the cheap flights and booking guide, head south using the Canada to US flights guide, or fly overseas with the Canada to India flights guide.
Frequently Asked Questions
Which is the cheapest airline in Canada?
Ultra low-cost carriers Flair and Lynx usually have the lowest base fares, though baggage and seats cost extra.
When is the cheapest time to book domestic flights?
About 6–8 weeks ahead, with mid-week departures the cheapest to fly.
Do budget airlines really save money?
Only if you travel light — once you add bags and seat selection, the total can match a full-service fare.
Is Porter better than Air Canada or WestJet?
Porter offers a more comfortable experience on Eastern routes; Air Canada and WestJet have far wider networks.
Which airline has the widest domestic network?
Air Canada, followed by WestJet, which is especially strong in Western Canada.