Cheap flights from Denver to Boston
The cheapest round trip from Denver to Boston that travelers found recently is $347 with a carry-on: a $347 fare on Southwest, which usually includes a carry-on. It leaves Fri, Oct 30 and comes back Sun, Nov 1.
Live prices for Fri, Oct 30 to Sun, Nov 1
Cheapest trips travelers found recently
| Leave | Return | Airline | Airports | Stops | Fare | Carry-on (est.) | Total | Live prices |
|---|---|---|---|---|---|---|---|---|
| Fri, Oct 30 | Sun, Nov 1 | Southwest | DEN → BOS | Nonstop | $347 | Included | $347 | Live price |
| Fri, Jan 22 | Sun, Jan 24 | American Airlines | DEN → BOS | 1 stop | $362 | Included | $362 | Live price |
| Fri, Oct 16 | Sun, Oct 18 | Frontier | DEN → BOS | 1 stop | $683 | +$110 | $793 | Live price |
Round-trip prices per person, from real fares travelers found in the last few days. Carry-on fees are our estimate for each airline, both ways. Prices change fast: check the live price before you book.
Cheapest month to fly
| Month | Cheapest trip | From | Live prices |
|---|---|---|---|
| October 2026 | Fri, Oct 30 to Sun, Nov 1, 2 nights | $347 | Live price |
| January 2027 | Fri, Jan 22 to Sun, Jan 24, 2 nights | $362 | Live price |
Bag fees on this route
What the airlines flying Denver to Boston usually charge for one bag each way. Budget airlines often sell the cheapest fares and charge the most for bags, so compare the total, not the fare.
| Airline | Carry-on, each way | Checked bag, each way |
|---|---|---|
| American Airlines | Included | $40 |
| Frontier | $55 | $50 |
| Southwest | Included | $35 |
Our estimates: fees depend on the fare type and when you pay. Check the airline's own price when you book.
How these prices work
These are real round-trip fares that travelers found on Aviasales recently, not a live search, so they can change or sell out. Dipt adds an estimate of each airline's carry-on fee, so a cheap fare with expensive bags doesn't look cheaper than it is. "Live price" opens Dipt's live flight search for those dates, where you book with the airline or travel site you pick. Dipt may earn a commission when you book, at no extra cost to you (how Dipt makes money).
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