Cheap flights from Boston to Salt Lake City from $454 BOS → SLC
Logan International Airport (BOS) → Salt Lake City International Airport (SLC)
The cheapest return found recently is $454 with Frontier Airlines, 11 Dec – 18 Dec, found 2 days ago.
- Cheapest return found recently
- $454, 11 Dec to 18 Dec
- Usual return price
- $445 to $469
- Cheapest month to fly
- December 2026, return fares from $419 found in the last 7 days
Return
The cheapest return fare on each of 4 departure dates is usually $445 to $469.
Cheapest return found recently
$454
11 Dec – 18 Dec · Frontier Airlines
Logan International Airport (BOS) → Salt Lake City International Airport (SLC)
Leaves 11:34 a.m. · Return leaves 11:05 p.m. · 28 h 58 min of travel, both ways together
out 2 stops, back nonstop
found 2 days ago
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$454 11 Dec – 18 Decfound 2 days agoSee prices for these dates
$419 10 Dec – 18 Decfound 6 days agoSee prices for these dates
What have prices looked like?
Over 37 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $361 to $461.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 10 Dec to 23 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 7-night return fares leaving within 3 days of 11 Dec to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 10 Dec – 18 Dec | $419 | jetBlue | Logan International Airport (BOS) → Salt Lake City International Airport (SLC) | out 2 stops, back 2 stops | found 6 days ago | See prices for these dates |
| 11 Dec – 18 Dec | $454 | Frontier Airlines | Logan International Airport (BOS) → Salt Lake City International Airport (SLC) | out 2 stops, back nonstop | found 2 days ago | See prices for these dates |
| 21 Feb 2027 – 28 Feb 2027 | $496 | Allegiant Air | Logan International Airport (BOS) → Salt Lake City International Airport (SLC) | out 2 stops, back 2 stops | found 3 days ago | See prices for these dates |
| 23 Feb 2027 – 28 Feb 2027 | $460 | Alaska Airlines | Logan International Airport (BOS) → Salt Lake City International Airport (SLC) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $419.
Airlines on the cheapest dates: jetBlue, Frontier Airlines, Allegiant Air, Alaska Airlines.
Premium cabin fares from Boston to Salt Lake City
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 11 Dec – 18 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Boston to Salt Lake City?
Return
The cheapest fares were 14 to 29 days before departure.
From the cheapest return each day between 24 Sept and 11 Nov (37 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 14–29 days | $368 | $361 | Cheapest seen | 15 |
| 30–59 days | $409 | $361 | +11% | 14 |
| 60–89 days | $441 | $420 | +20% | 10 |
| 90–179 days | $415 | $405 | +13% | 20 |
Live price for these dates
The cheapest return found recently is for 11 Dec – 18 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Boston to Salt Lake City?
The cheapest return found recently is $454 with Frontier Airlines, 11 Dec to 18 Dec, found 2 days ago. The cheapest return we hold, of any age, is $419 with jetBlue, 10 Dec to 18 Dec, found 6 days ago. The cheapest return fare on each of 4 departure dates is usually $445 to $469.
What is the cheapest month to fly from Boston to Salt Lake City?
December 2026 is the cheapest month for a return, from $419, 10 Dec to 18 Dec, found 6 days ago.
How far ahead should I book a flight from Boston to Salt Lake City?
In 37 days of prices between 24 Sept and 11 Nov, return fares were cheapest 14 to 29 days before departure.
Which airlines have the cheapest flights from Boston to Salt Lake City?
Between 10 Dec and 23 Feb 2027, jetBlue has the cheapest return on 1 of the 4 departure dates we hold, Frontier Airlines on 1 and Allegiant Air on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work