Flights San José (Alajuela) → Boston
As of October 2026, economy flights from San José (Alajuela) to Boston have a typical range USD 477–1368, median USD 747. Full range across all 125 offers: USD 307–10207. We analyzed 125 offers from 14 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: San José (Alajuela) → Boston
Based on 125 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: San José (Alajuela) → Boston
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| United Airlines | — | USD 35 | — |
| Southwest Airlines | Included | Included | — |
| Arajet | USD 15 | USD 25 | — |
| Avianca | Included | USD 30 | — |
| Air Canada | Included | USD 30 | — |
| Avianca | — | USD 1 | — |
| United | — | USD 1 | — |
| American | — | USD 1 | — |
| Copa Airlines | — | USD 40 | — |
| JetBlue | Included | USD 49 | — |
| Frontier Airlines | — | — | — |
| American Airlines | Included | USD 35 | — |
| Delta | Included | USD 35 | — |
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 San José (Alajuela) to Boston cost?
Based on 125 offers · October 2026
San José (Alajuela) to Boston flights ranged from USD 307 to USD 10207 across 125 offers analyzed in October 2026. The chart below shows how prices distributed across all 125 offers.
These 125 offers (October 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 USD 545 and USD 969
What hidden fees do San José (Alajuela) to Boston flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on San José (Alajuela) to Boston routes. The breakdown below is based on 125 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| UA | 45 | 7% |
| WN | 0 | 0% |
| DM | 48 | 11% |
| AV | 40 | 4% |
| AC | 42 | 5% |
| Avianca | 1 | 0% |
| United | 1 | 0% |
| American | 1 | 0% |
| CM | 55 | 9% |
| B6 | 52 | 3% |
| F9 | 10 | 1% |
| AA | 45 | 4% |
| DL | 33 | 3% |
Arajet: base ~USD 374 + fees USD 48 = ~USD 422 total. Avianca: base ~USD 470 + fees USD 1 = ~USD 471 total.
Arajet's USD 48 ancillary fees narrow the gap with Avianca's lower-fee model — the USD 96 base difference shrinks to USD 49 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.CM charges 55.0x more in ancillary fees than American on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from San José (Alajuela) to Boston?
14 airlines flew San José (Alajuela) to Boston 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 (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Arajet | 1 | — | 422 | 48 (11%) |
 Avianca | 1 | — | 471 | 1 (0%) |
 United | 4 | 371–515 | 501 | 1 (0%) |
 American | 9 | 495–510 | 510 | 1 (0%) |
 Copa Airlines | 16 | 537–817 | 591 | 55 (9%) |
 Air Canada | 14 | 472–1799 | 633 | 42 (7%) |
 United Airlines | 20 | 424–852 | 637 | 45 (7%) |
 Frontier Airlines | 1 | — | 736 | 10 (1%) |
 American Airlines | 12 | 835–1646 | 837 | 45 (5%) |
 AM | 2 | 779–909 | 844 | n/a |
 Avianca | 19 | 539–1595 | 861 | 40 (5%) |
 B6 | 10 | 704–1992 | 864 | 52 (6%) |
 Southwest Airlines | 10 | 711–1141 | 1058 | 0 (0%) |
 Delta Air Lines | 6 | 955–1248 | 1143 | 33 (3%) |
Where do the best San José (Alajuela) → Boston prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from travel agency 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: San José (Alajuela) to Boston flights
- Full-service carriers on San José (Alajuela)–Boston cost 0.8x more than budget airlines (USD 677 vs USD 886 median; overall median USD 747).
- CM charges 55.0x more in ancillary fees than American — USD 55 vs USD 1 avg per booking.
- The same route priced USD 325 apart depending on where it was booked — the lowest median was USD 510. 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 San José (Alajuela) to Boston cost?
- Based on 125 offers analyzed, San José (Alajuela) to Boston flights range from USD 307 to USD 10207, with a median price of USD 747. Search for your specific dates →
- What hidden fees should I expect on San José (Alajuela) to Boston flights?
- On average, ancillary fees (bags, seat selection) add USD 37 to the base fare on San José (Alajuela) to Boston flights. See itemized fees for your itinerary →
- Which airline is cheapest on San José (Alajuela) to Boston including all fees?
- Arajet has the lowest median fare on San José (Alajuela) to Boston at USD 422 (median across 1 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest San José (Alajuela)–Boston 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 USD 510. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on San José (Alajuela) to Boston routes?
- San José (Alajuela) to Boston has 14 airlines competing, creating a price range from USD 307 to USD 10207 across 125 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
14 airlines compete on this route — we check every one
Find flights for my datesNew route — be among the first to track this itinerary
Building with flight data? Power your app or agent with LetsFG
The same multi-source search behind this page — every airline and the major booking sites, deduplicated and ranked — is available to your app or AI agent. Natural-language or structured queries, live prices, zero price bias.
Try the free sandbox — no card →Free sandbox, instant fake results · email for a key · Bearer-token auth · MCP, Python & JS SDKs · letsfg.co/developers