Fares shown are modelled estimates, not live quotes.
Other budgets from Boston:
Lowest Route Estimates from Boston Under $400
Sorted by modelled price estimate, not live fare data. Fare reviews are paused during the provider migration.
BOS → NAS
Nassau
Bahamas
Est. $105
round trip
~4h flightTrack price →
BOS → PUJ
Punta Cana
Dominican Republic
Est. $139
round trip
~4h flightTrack price →
BOS → SDQ
Santo Domingo
Dominican Republic
Est. $139
round trip
~4h flightTrack price →
BOS → SJU
San Juan
Puerto Rico
Est. $141
round trip
~4h flightTrack price →
BOS → MBJ
Montego Bay
Jamaica
Est. $143
round trip
~4h flightTrack price →
BOS → GCM
Grand Cayman
Cayman Islands
Est. $143
round trip
~4h flightTrack price →
BOS → STT
St. Thomas
US Virgin Islands
Est. $143
round trip
~4h flightTrack price →
BOS → KIN
Kingston
Jamaica
Est. $145
round trip
~4h flightTrack price →
BOS → CUN
Cancun
Mexico
Est. $146
round trip
~4h flightTrack price →
BOS → SXM
St. Maarten
Sint Maarten
Est. $147
round trip
~4h flightTrack price →
BOS → ANU
Antigua
Antigua and Barbuda
Est. $154
round trip
~5h flightTrack price →
BOS → MTY
Monterrey
Mexico
Est. $169
round trip
~5h flightTrack price →
BOS → AUA
Aruba
Aruba
Est. $174
round trip
~5h flightTrack price →
BOS → UVF
St. Lucia
Saint Lucia
Est. $174
round trip
~5h flightTrack price →
BOS → CUR
Curacao
Curacao
Est. $176
round trip
~5h flightTrack price →
BOS → BGI
Barbados
Barbados
Est. $180
round trip
~5h flightTrack price →
BOS → POS
Trinidad
Trinidad and Tobago
Est. $191
round trip
~6h flightTrack price →
BOS → MEX
Mexico City
Mexico
Est. $192
round trip
~6h flightTrack price →
BOS → GDL
Guadalajara
Mexico
Est. $202
round trip
~6h flightTrack price →
BOS → KEF
Reykjavik
Iceland
Est. $203
round trip
~6h flightTrack price →
BOS → PVR
Puerto Vallarta
Mexico
Est. $209
round trip
~6h flightTrack price →
BOS → SJD
Los Cabos
Mexico
Est. $217
round trip
~6h flightTrack price →
BOS → DUB
Dublin
Ireland
Est. $251
round trip
~7h flightTrack price →
BOS → GLA
Glasgow
United Kingdom
Est. $254
round trip
~7h flightTrack price →
BOS → EDI
Edinburgh
United Kingdom
Est. $257
round trip
~7h flightTrack price →
BOS → MAN
Manchester
United Kingdom
Est. $264
round trip
~7h flightTrack price →
BOS → OPO
Porto
Portugal
Est. $264
round trip
~7h flightTrack price →
BOS → LIS
Lisbon
Portugal
Est. $268
round trip
~7h flightTrack price →
BOS → BHX
Birmingham
United Kingdom
Est. $268
round trip
~7h flightTrack price →
BOS → LHR
London
United Kingdom
Est. $274
round trip
~8h flightTrack price →
BOS → FAO
Faro
Portugal
Est. $277
round trip
~8h flightTrack price →
BOS → SVQ
Seville
Spain
Est. $285
round trip
~8h flightTrack price →
BOS → MAD
Madrid
Spain
Est. $286
round trip
~8h flightTrack price →
BOS → CDG
Paris
France
Est. $289
round trip
~8h flightTrack price →
BOS → AMS
Amsterdam
Netherlands
Est. $290
round trip
~8h flightTrack price →
BOS → BRU
Brussels
Belgium
Est. $292
round trip
~8h flightTrack price →
BOS → AGP
Malaga
Spain
Est. $292
round trip
~8h flightTrack price →
BOS → OSL
Oslo
Norway
Est. $293
round trip
~8h flightTrack price →
BOS → DUS
Dusseldorf
Germany
Est. $299
round trip
~8h flightTrack price →
BOS → HAM
Hamburg
Germany
Est. $304
round trip
~8h flightTrack price →
BOS → BCN
Barcelona
Spain
Est. $306
round trip
~8h flightTrack price →
BOS → LYS
Lyon
France
Est. $306
round trip
~8h flightTrack price →
BOS → FRA
Frankfurt
Germany
Est. $308
round trip
~8h flightTrack price →
BOS → CPH
Copenhagen
Denmark
Est. $308
round trip
~8h flightTrack price →
BOS → GVA
Geneva
Switzerland
Est. $308
round trip
~8h flightTrack price →
BOS → IBZ
Ibiza
Spain
Est. $310
round trip
~8h flightTrack price →
BOS → MRS
Marseille
France
Est. $312
round trip
~8h flightTrack price →
BOS → PMI
Palma de Mallorca
Spain
Est. $313
round trip
~8h flightTrack price →
BOS → ZRH
Zurich
Switzerland
Est. $314
round trip
~8h flightTrack price →
BOS → ARN
Stockholm
Sweden
Est. $314
round trip
~8h flightTrack price →
BOS → BER
Berlin
Germany
Est. $318
round trip
~9h flightTrack price →
BOS → NCE
Nice
France
Est. $319
round trip
~9h flightTrack price →
BOS → MXP
Milan
Italy
Est. $320
round trip
~9h flightTrack price →
BOS → MUC
Munich
Germany
Est. $323
round trip
~9h flightTrack price →
BOS → PRG
Prague
Czech Republic
Est. $327
round trip
~9h flightTrack price →
BOS → HEL
Helsinki
Finland
Est. $330
round trip
~9h flightTrack price →
BOS → TLL
Tallinn
Estonia
Est. $332
round trip
~9h flightTrack price →
BOS → VCE
Venice
Italy
Est. $333
round trip
~9h flightTrack price →
BOS → FLR
Florence
Italy
Est. $333
round trip
~9h flightTrack price →
BOS → RIX
Riga
Latvia
Est. $337
round trip
~9h flightTrack price →
BOS → LJU
Ljubljana
Slovenia
Est. $338
round trip
~9h flightTrack price →
BOS → VIE
Vienna
Austria
Est. $340
round trip
~9h flightTrack price →
BOS → WAW
Warsaw
Poland
Est. $342
round trip
~9h flightTrack price →
BOS → BTS
Bratislava
Slovakia
Est. $342
round trip
~9h flightTrack price →
BOS → FCO
Rome
Italy
Est. $343
round trip
~9h flightTrack price →
BOS → KRK
Krakow
Poland
Est. $345
round trip
~9h flightTrack price →
BOS → ZAG
Zagreb
Croatia
Est. $345
round trip
~9h flightTrack price →
BOS → LED
St. Petersburg
Russia
Est. $345
round trip
~9h flightTrack price →
BOS → VNO
Vilnius
Lithuania
Est. $347
round trip
~9h flightTrack price →
BOS → BUD
Budapest
Hungary
Est. $351
round trip
~9h flightTrack price →
BOS → SPU
Split
Croatia
Est. $353
round trip
~9h flightTrack price →
BOS → NAP
Naples
Italy
Est. $354
round trip
~9h flightTrack price →
BOS → SJJ
Sarajevo
Bosnia and Herzegovina
Est. $359
round trip
~10h flightTrack price →
BOS → DBV
Dubrovnik
Croatia
Est. $363
round trip
~10h flightTrack price →
BOS → BEG
Belgrade
Serbia
Est. $363
round trip
~10h flightTrack price →
BOS → TGD
Podgorica
Montenegro
Est. $367
round trip
~10h flightTrack price →
BOS → MLT
Malta
Malta
Est. $371
round trip
~10h flightTrack price →
BOS → TIA
Tirana
Albania
Est. $372
round trip
~10h flightTrack price →
BOS → SVO
Moscow
Russia
Est. $375
round trip
~10h flightTrack price →
BOS → SKP
Skopje
North Macedonia
Est. $377
round trip
~10h flightTrack price →
BOS → SOF
Sofia
Bulgaria
Est. $380
round trip
~10h flightTrack price →
BOS → OTP
Bucharest
Romania
Est. $383
round trip
~10h flightTrack price →
BOS → SKG
Thessaloniki
Greece
Est. $386
round trip
~10h flightTrack price →
BOS → ATH
Athens
Greece
Est. $399
round trip
~10h flightTrack price →
How to Find Flights Under $400 from Boston
1
Book 6–10 weeks in advance
This is typically the sweet spot for international fares from Boston. Too early and airline seats aren't discounted yet; too late and inventory is tight. The $400 threshold is easiest to hit in shoulder season.
2
Fly mid-week
Compare Tuesday and Wednesday departures from Boston with weekend dates before booking.
3
Join the weekly fare email
Sign up now. Fare reviews and weekly cheapest-fare emails begin after the rebuilt feed is live.
Frequently Asked Questions
Are there really international flights from Boston under $400?
84 routes from Boston have modelled round-trip estimates at or below $400. These are based on route distance and region, not live or historical fares.
When is the best time to find flights from Boston under $400?
Shoulder seasons (April–May, September–October) can offer lower prices. Compare mid-week departures and nearby dates before booking.
What is the cheapest destination from Boston?
Based on modelled estimates, Nassau is one of the lowest estimated routes from Boston at around $105 round trip. This is not a live fare.
Get weekly fares from Boston
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